None of any of this thread served any purpose. Group A is upset at Group B because Group C might hypothetically do Actions D or E to Group A. Everything else is just an attempt by various posters to justify their preferred course of action by appealing to various sciences of varying degrees of softness or hardness.
I suggest nothing can be achieved until everybody skips the crap and just states what their best solution is, and then people can agree or not on the actual action suggested rather than debate literally everything else except actual action. Policy is always action taken, it's not viewpoint however erudite.
I think everyone understands that this whole discussion is about 90% baggage or proxy debates about other topics.
Most everyone thinks they deserve a safe space where "X" is not allowed. The problem is who is "X" is a very hot button topic because we have a discussion where "personal identity" is being treated as an objective fact.