The Right to resist is a well-known cornerstone of liberalism, and yes Israel has been chipping away at it since its formation and Nakba.
If October 7 had been directed against the West Bank settlers then we could get behind it, but instead it was just Hamas expressing their genocidal intent.
https://en.wikipedia.org/wiki/Hannibal_Directive#Claimed_use...
Secondly, I can assure you that you would NOT have gotten behind anything Hamas did. You (not you specifically, just generally) wouldn’t have supported them because you’re conditioned to not support them. You are also more susceptible to propaganda than you think you are, and trust me, the media machine would have been in full gear regardless of what operation Hamas pulled off.
It is easy to talk about theoreticals, but if you’re missing the ongoing reality, why do you think that you would handle the theoretical scenario any differently? Same idea applies to fiction. People jump to oppose the Empire, but had they been living in the Star Wars universe, odds are that Imperial propaganda would have been extremely effective.
There is a recent saying on liberals, but I think it applies more broadly: “A liberal is someone who opposes every war except the current war, and supports all civil rights movements except the one that's going on right now.”