One thing about God's dealing with human beings is we have free choice you always serve God it's your choice when you serve as Judas or not. But you will serve it's just that God makes due with our choices. In fact that idea of free will is probably the most capitalistic concept in the Bible. Don't forget the only direct change in a human being without that person's explicit request was the pharaoh who's heart was hardened against Moses by God. The reason the pharaoh's heart was hardened in such a negative manner was he was already head down after all one of his favorite amusements was betting how long children would last in a pit with hungry dogs.