It’s a very big question you’re posing (as you acknowledge in fairness). The broad strokes are basically correct, but there are other relevant details. For example, there is a traditional political rivalry between Aleppo and Damascus which helped produce the Ba’th’s ascendency and with it Alawite dominance. In Ottoman times the large cities of the Levantine interior along the north-south axis (Aleppo-Hama-Homs-Damascus) were more closely linked with the port cities of the Mediterranean coast to their west, and other urban market centres on a west-east axis. So, for example, Aleppo was very closely linked to Tripoli, Alexandretta, and Mosul more so than Damascus. Likewise Damascus was closely linked to Jaffa, Beirut, and Nablus. More generally Damascus had a Mesopotamian/Iraqi orientation while Damascus looked to Egypt.
What this meant was that when the interwar mandates imposed borders which cut these sister cities off from each other, Aleppo and Damascus were left facing each other in a struggle for power in Syria. This was reflected in the composition of the two nationalist parties that vied for power in the 40s and 50s, which were dominated by Sunni elites of each city respectively. And as Syria was at that time a weak, decentralized state (partly as a result of the kind of colonial policies you’ve referred to), these parties inevitably became almost proxies in a larger geopolitical struggle for Syria between Hashimite Iraq (supported by the British) and Nasserite Egypt.
The instability that resulted had the effect of weakening and discrediting each party and thus helped facilitate the rise of the more ideological parties - the Ba’th, the SSNP, the Communists - which had always appealed to the non-Sunni minorities and the poorer, rural population as a means by which to attain some measure of representation in the country’s politics. By the end of the 50s the Ba’th had managed to orchestrate the Union with Egypt which they mistakenly believed they could dominate. After that fell apart in 61 they soon seized power in Syria, but it wasn’t until 1970 that the Alawite-dominated faction of the party really consolidated power.
Another factor might be the fact that Damascus was a traditional stronghold of the Hanbali school of Islamic jurisprudence, which in turn is closely linked to Salafism. Several 19th/early 20th century Salafi scholars of repute were based in Damascus. This may have helped provide a foundation for the rise of the Islamist opposition to the Ba’th in the 70s and early 80s, although it is hard to draw concrete lines of causation. But certainly fair to say that the Muslim Brotherhood campaign of those years was a significant precursor to this war.
Finally, many analysts have argued that a severe drought during the 2000s combined with the partial opening-up of the economy during the first few years of Bashar’s reign negatively impacted much of the Sunni-dominated rural areas. The argument goes that many were forced to migrate to urban slum-type neighborhoods, always a breeding-ground for the type of alienation and resentment that Islamist politics tends to exploit. At the same time, Bashar’s neoliberal reforms did tend to empower the urban middle-class, which includes Syrians of all denominations. These had the most to lose as the country descended to civil war, and so along with the religious minorities constituted the regime’s base during the conflict. As such, they became natural targets for the disenfranchised and increasingly Islamist opposition as the war progressed. I should note that I have seen the ‘drought’ thesis heavily questioned by others. It may be too soon to reliably judge its impact.
(edit): I’d also add that Bashar didn’t do himself any favors by facilitating the entrance of thousands of jihadis into Iraq to fight the Americans during the 2000s. As so often happens, that policy came back to bite him in the arse.
I will start by saying most of what you said neglected the torture of kids, killing of the poor, and raping of women that the regime and its army did to my people, deciding to go with the historical route as an explanation which does NOT represent the humanitarian crimes comitted by the regime, you think only rural areas were affected and were against the regime because of a drought or relegious reasons, when the truth is this regime been taking political prisoners and murdering innocent people for 50 years, and ignoring the fact that people in Damascus and Aleppo were under extreme pressure to not join the protests because of the massacre the regime would have comitted had they joined.
Then you talk about the Hanbali school and how it relates to salafisim, which has no real foundation on the ground, in fact most people in Damascus follow the Hanafi and Shafii teachings, not that most actually use it as part of their daily lives and way of political thinking, but your words paints us as relegious robots who have 0 original thought and are bound to relegion when it comes to polotics.
As for the political rivalry between Damascus and Aleppo, it's not been in play in centuries, it's forgotten history, it may provide some explanations on how the regime siezed power in the 70, but it doesn't reflect the realities of the rebellion that happened.
You don't realize how it feels to have your food and money stolen by political figures who take the wealth of the land, and how it feels to be discriminated against in your own country even though you are part of the "majority", instead you explain it by "islamists" this and "islamists" that, when those islamists were released by the regime from its prisons around 2012, used them against the actual rebels who are from the people, and then regained power in those areas because they have actual control over these groups leaders, at least this part makes me impressed with how the regime turned the western media against the people using the fear of islam that blinded people to the fact that isis barely resisted when the army "attacked".
What about how Obama and western leaders kept lying and making false promises to rebel groups that they will help the people and aid them and then turned a blind eye when the regime kept doing massacre after massacre to cities around Syria, why did you fail to mention that these groups started after a long peaceful period of protests to defend their families and their lands from regime killings?
I'm not even denying that there are terrorist groups now calling themselves muslim and doing as much damage to the people as the regime was doing before in their areas of control, but they aren't the explanation nor the reason the war happened.
In short, we are not relegious puppets who can be explained through history and books, we are a people with thoughts and emotions that were driven into war against not only a dictator but a merciless monster and were left to die by the world at large only to be explained later as "islamists", did we have to abandon our belief system and relegion in order to appease western countries and convince the world to save us from this monster?
I would like to end this post with saying that my post maybe incoherent as English isn't my 1st language and I can't easily express my thoughts with it, but I hope it at least provides some insight into why your post makes me feel sad and aggrieved.