To me, “This community does not affirm practiced LGBTQ+ lifestyles” isn’t hate speech, but is anti-lgbtq, which is a thing the admins of lemmy.world are right to take action on if they’re trying to cultivate an instance that is friendly to lgbtq folks.
I think that’s why even though the community had additional rules in the sidebar about not condoning violence against lgbtq, and athiestmemes has content Christians find offensive, the admins deleted the community. It’s clearly still a contested subject within the thread, but at the end of the day lemmy’s general response to people that don’t like the rules of their instance is to find another instance.
Something else to note is that there are multiple levels of shunning in fediverse. The admin in the thread deleted the community, but would still federate with a server that hosted it.