Well, if they believe that God is going to abort them from the New Birth, then they don't actually believe the whole of the Bible do they?
It's pretty breathtaking to assume that your reading of the Bible is the only right answer. Me, I think I'll stand on this:
2 Peter 2:20 -- For if, after they have escaped the pollutions of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them and overcome, the latter end is worse for them than the beginning. 21 For it would have been better for them not to have known the way of righteousness, than having known it, to turn from the holy commandment delivered to them.
Doesn't sound like once-saved-always-saved to me.