Criticism is something where the other side can say “you’re right, I’ll stop that and do better”.
“Israel shouldn’t exist” isn’t criticism, the Israelis currently living there can’t just stop existing.

You can criticize Israel on feddit, most of its users do.
Calling for the destruction of Israel isn’t criticism. Same as writing “Death to America” wouldn’t be criticism of the Trump administration.
And if you react to a comment removal by telling the mods to kill themselves or calling them Nazis, you’d get booted off any instance regardless of what the comment was about.

At this point I wish you’d go ahead and defederate, if that makes these idiotic discussions stop.
I’m actually offended by being called a supporter of the Israeli government just because feddit is my home instance.
I’m also pretty sure that feddit-bashing won’t improve the life of a single Palestinian one bit.