800, since God knows whether we will make it or not, would he call someone who he already knows will fail, thereby condemning him to eternal Hell?
You and I probably start from different places. I think God calls everyone. Thus, the call for the one who becomes apostate is no different than the call everyone else gets.
He knows that this person has chosen failure. God does not condemn us to Hell, we do. But that doesn't mean that He won't use our failure for the greater good. The failure of Judas is a good example here.