People in prison don't need to protect themselves?Felons and Crazy People: If they are locked up, yes. If they are not locked up, then I would say no.
Even the ones that use their 1A human/natural right of free speech to promise death to minorities?Foreigners: They should be allowed to KBA
Any of them. All of them. As a hRKBA, it doesn't matter, does it?Enemies: Not sure what you mean by this. A country we are at war with?