That's NOT what it says.
It says that Judas IS a devil - now. It doesn't say that he WAS a devil when he was chosen.
A devil cannot cast out a demon in the name of Christ or heal the sick.
And we are not told that Judas cast out any demons or healed anyone.
Right...Judas is a devil. He doesn't become a devil. He is a devil. That is what he was when Christ chose him.
Stranger