Don’t let someone like this distress you. There have been plenty like him in the past and many of which have converted to the Catholic Church. Does Scott Hahn ring a bell, he was a Presbyterian minister and theologian and self confessed anti-Catholic (‘Rome Sweet Home’), now he is a Catholic theologian, writer and defender of the Church. Go to EWTN and watch ‘The Journey Home’ program and you will see each week a different pastor, theologian, Atheist, etc. who have come to the Catholic Church. All you can do is pray for James White!
