It's not so simple. As one of the legal experts mentioned at the start, the defense obviously wants people to solely focus on the few seconds before Rittenhouse started shooting, which would favor his claim of self-defense. The prosecution should want people to focus on the full chain of events - essentially expanding the timeline - so include the fact that rittenhouse follows the group and acts reckless to eventually run after them (which I personally would deem a pursuit or chase). Rittenhouse had countless opportunities to abandon his course of action and return to safety where his own friend was posted up doing what they claimed to be doing.
Here is another shot of Rittenhouse that night.
This photo shows how Rittenhouse looked when patrolling. He has an AR-15 strapped to his body, holds it at a ready position with his finger right next to the trigger. The notion, as some with an agenda have suggested, that the"medical bag" strapped to his back somehow makes this person appear non-threatening or confirm his completely innocent intend is absurd. If this man here is following me, I would deem it an extremely threatening situation. It's quite reasonable that people would not even conclude that is a medical bag but a bag with more weapons. No reasonable person is going to look at how he was dressed and think "oh just a medic."
The second takeaway here: who is that second person? It's one of the witnesses called by the state, Ryan Balch. Who is Ryan Balch? An avowed boogaloo boy.
32 boogaloo boys were at Kenosha that night. They are either pure white supremacists or as Balch describes himself, simply a radical librarian or anarchist who believes a civil war is “imminent.”
Balch himself has posted far-right imagery and even a video called "The Truth Will Triumph Adolf Hitler" but Blach claims he was just looking for good memes and just "posing" as a member of the alt-right.
So this is who Rittenhouse was rolling with that night. A group that, at best, is simply radical anarchists that are anti-government and anti-liberal and at worst are white supremacists. It's hardly crazy for people to feel threatened by the presence of someone that looks like this rolling around with a group of boogaloo bois.
For the gunshot, it's been presented a certain way but for more context, let's look at a picture:
While you are right that it's not unreasonable to feel threatened if you hear a gunshot, when you look at the positioning it really begs the question of why Rittenhouse didn't run the other way, away from this group of people that some say were definitely setting up an ambush? There were many cars and a good distance between this handgun and Rittenhouse. At many points, before the victim charged at Rittenhouse, Rittenhouse could and should have simply turned around and gone the other way which is what I believe any reasonable person looking to avoid a confrontation would have done. Of course, if we only focus on the precise few seconds before the shooting, it's perfectly reasonable to argue a person has a right to defend himself. The point of many in this thread is that no reasonable person would have placed themselves in this position to begin with because he easily could and should have avoided getting into this position. On the other hand, it's also reasonable for people to feel threatened by someone decked out like Rittenhouse and patrolling with people like the boogaloo bois.