Has your opinion of Isreal changed because of the last few months?
It changed insofar as going from "they're a pretty horrible fascist society" to "they're straight up Nazis".
If so has that changed how you view their actions in the past against the Palestinian people?
Not really.
If the comparison of Russia in Ukraine to Isreal in Palestine was only made legitimate in the past few months [...]
You're commiting a fallacy, I believe and hope unintentionally. Israel has always been the aggressor, I've never contradicted that. However, defending a population associated with a vile terrorist group at a time said group has just attacked is simply bad politics - you'll not get many allies and now your detractors have a concrete event to point towards when dismissing your position. At present, Israel has effectively admitted to wanting a genocide and Hamas has waved the white flag multiple times, so it's the perfect moment, politically, to defend the Palestine.