Whether it was a misapplication of scripture, or not, I don't know - but the 'Evangelical backer' was making reference to Jeremiah Chapter 16, where God says that after driving the people out of Israel, HE will bring them back to the land by 'fishers and hunters':
Jeremiah 16
15 But, The Lord liveth, that brought up the children of Israel from the land of the north, and from all the lands whither he had driven them: and I will bring them again into their land that I gave unto their fathers.
16 Behold, I will send for many fishers, saith the Lord, and they shall fish them; and after will I send for many hunters, and they shall hunt them from every mountain, and from every hill, and out of the holes of the rocks.
God has certainly uses evil men for his purposes - and God is sovereign over all.
I don't know about concentration camps (if the evangelical guy was quoted properly - I think he pulled that one out of his posterior), but his other comments are in line with what one would expect from a Christian.
Good points, and like I said, God has punished the Jews before for rejecting Him and now His Son their Messiah, why would I question some preacher for saying it is possible He would do so again?