The problem of Judas

Why Judas, is one of those questions which we just have to trust that there is an answer which allows free will and predestination to co-exist.

John 17 verse 12, is a difficult verse: ‘None have been lost except the one doomed to destruction so that Scripture would be fulfilled.’

We understand that Jesus had foreknowledge of events and we also know that the betrayal by Judas was prophesied in Psalms 41 and 109; but I guess my problem is that it is hard to think that some people are predestined for destruction – how do you handle this specific issue?