I wouldn't actually rate calling something a person has said bigotted, if you think it is, an attack rather than an expression of difference. (I don,t like to noun "bigot", because it is a lot more wide ranging, and refers to a person as a whole rather than something they may have said on some occasion.) "Ant in a swarm" is pretty mild, and "born again" for someone who has radically changed their world view in adult life, either in a religious or political context, is surely fair enough?

As for only one kind of evidence... I doubt very much if you or anyone else uses scientific evidence in relation to views about Mozart or Beethoven. (Which isn't an analogy this time, but a counter-example.)

But never mind. Not to worry.