I'm probably the furthest thing from an active supporter of trans (whatever you take it to mean, I'm old-fashioned about gender). But how does it matter to this

I'm probably the furthest thing from an active supporter of trans (whatever you take it to mean, I'm old-fashioned about gender). But how does it matter to this story at all? You could take any group of people and find a crazed group of killers among them.... And people tend to stick to people like them, so again, how is it relevant?