I feel that theists react in this way towards other flavors of theism because they know, at some level at least, that they can't back their shit up. Now, towards us, they'll happily make arguments up. Because, when we shoot those down, they'll just make new ones up on the spot. The buckshot tactic ... just keep firing off nonsense and some of it will not be deflected immediatly.
With other-flavor theists ... this doesn't work. They can make up shit too. You shoot 20 arguments at them, they shoot 20 back.
So, what do you do? You stop them from even coming near you. The lalala-I-Can't-hear-you approach to philosophy. And if the well-being of your kids is a casualty of this approach, then so be it. The One True Faith (tm) trumps everything.