My impression is that they didn’t say “hey we don’t have customer information but we don’t service violent groups and we will responsibly investigate and discontinue service to offenders.”
Their vibe was much more defiant, like, “we designed this to be anonymous and specifically intend/expect for it to be used in any way regardless of legality and are okay with it.”
Is it right for the US to be the global arbiter of this issue and domains in general? Of course not.