Well I wouldn't consider his pre-flop 3bet range that tight. After all he is isolating a 53/24 guy. His range must be at least 88+, KJs+, AJs+, AQo+ I assume. And I think he would raise this retarded 1/7 pot lead at least all the pairs in his range. He may raise with his draws too but I can't see many draws in his range since your Kh blocks most of them.