Well, logically, there really were a significant portion of the population who in fact were not okay with what they were seeing in Gaza, from the very beginning.
Your "its the Russians" is just matroska-izing the real issue, which is that the people don't have a voice, in your mind, if the political viewpoint doesn't match a world view in which "the Russians are the bad guys".
The genocide of Gaza was been hugely unpopular since the very beginning.
"there really were a significant portion of the population who in fact were not okay with what they were seeing in Gaza,"
I'm not saying there wasn't. BUT the extreme consistency of the people commenting about it on sites like Reddit combined with the fact that it ultimately ends up helping Trump get elected makes me update my Bayesian estimate that Russia and/or the GOP is behind a lot of them. You saw the same thing in 2015 with all the "Hillary will start world war 3" posts. Those weren't organic at all. You see it in every US presidential election since Hillary v Trump: Many "people" making very similar posts about some reason why democrats or liberals shouldn't vote for the Democratic candidate. This works because voter turnout is what wins or loses elections.