Because they're murderous heretics.
If you are referring to the Christians by that statement, I'm afraid I disagree. Missionaries and their families (children) are hardly that.
I read your profile and understand where you are coming from. Unfortunately, because religion is involved, passions on either side cloud the real issues, and neither one of us is probably going to budge.
BTW, and totally off the subject, good choice for a sidearm. Besides my Beretta, my second (spare) weapon of choice is a Walther P99.
I hope and pray that we find peace.