Shout them down in every space, make them embarrased to think the stupid shit they think.
If we don't embarrass and correct them now we will have to kill them later when they come for our friends and families.
Plus they associate war with masculinity and magic with femininity, and their main guy is the god of both. Women fought and men learned magic. Clearly gender was a pretty flexibly concept. (Not to even mention that we found what appears to be trans masc viking burials.)