he may want to stop it.
he’s probably hoping they pour over the border and murder a bunch of stupid women so he can say how right he was, and also that way a bunch of women would be dead.
That train of thought has too long a track though. More likely he just pulls ideas out of his butt; or that someone else (intelligent or not) had an idea, and since they were the last one to talk to him he said “let’s go with it.”