So I was reading that, supposedly, the Ordo Malleus kills anyone that works with them who doesn't die in service (aside from astartes) to hide their existence and chaos or something like that? I can understand the people not knowing about the Ordo Malleus (after all, their Chamber Militant is kept very secret) but do people not know about Chaos either? Because it would seem that in a lot of fiction, people have at the very least heard of it.