100%. They're not the only ones either, it's become the industry status quo for platforms to allow these groups to operate openly - Discord has the same policy and houses some of the largest organized hate groups online. You can make the case that this way at least they can keep tabs on them and give any relevant information to authorities when crimes are committed.

To be clear I'm not trying to rail on the founders of these orgs, I can't say for sure that I'd do much better in their position, it's a business first after all.