lemmy.ml is not a general-purpose instance. We have community standards. To quote from that post, linked on our front page:

If you dont like the way lemmy.ml works, thats okay. Federation exists exactly to solve that problem, let different groups have their own instances, with their own rules and political views. You can see the list of existing instances, and instructions for setting up a new one on join-lemmy.org.

lemmy.ml, as a community, don't tolerate posts advocating the invasion and genocide of Gaza. Why should we? There's no value in their offensive post whatsoever. There's no societal benefit in allowing it just because, there's no reason in some abstract liberalist tolerance of everything, we are an anti-bigotry community and our moderators have an obligation to our community to kick that junk out. So why should they be allowed to say it?

And I think it's harmful to frame this as being about "opposing views" or "disagreement". It's about kicking out someone who wants innocent people, including some members of our community, killed by a proudly-genocidal ethnostate's imperialist invasion. That's not merely an opposing view or a disagreement! That's not even some abstract what-if or some reasoned critique, that's simply endorsing a threat to our community. If you want to see that stuff, for whatever reason, then you'll need to look somewhere else. We don't platform trash here.

(And, in case you need the cherry on top, they've also made another post supporting rape as a war crime ^[link]^)