2 or 3k killed would be a 1:2 ratio. Israel always kills in a minimum 1:10 ratio.
A weekend is also impossible. It took them one weekend just to drive Hamas out of Israel. Their previous major bombings of Gaza have all lasted a month or more, usually timed around US elections (2009, 2012, 2014, etc). Obviously this time would be more.
I don't understand this line: " I honestly didn't think the Israeli's would allow the far-right elements to succeed in their dreams."
This government's actions in Gaza represent the centre of Israeli Jewish opinion. It matches the far-right, yes, but the country has been largely united in supporting the war effort. Bibi himself is by definition not a far-right figure, even if he has a few in his cabinet, his party is the centre-right of Israeli politics.
I had no doubt that Israel would get to about 15-20k deaths. Every US president would wholeheartedly support that. It's the continued support beyond these 10X thresholds that seems to be new - but is consistent with Biden's longstanding views towards this conflict. Of course, it's not totally "new" - the founding of Israel included the permanent cleansing of 750k people including the killing of 15k, so they have a lot of room for expansion in one aspect of their current operation.
Based on all this, and the very open statements from Biden and the Israeli govt, I am quite mystified at what you thought in October (at the end of which the death toll was already about 9000.