LUHE: whom do you believe to be more devout? ISIS or Maajid Nawaz?
Devout? As in "totally committed to a cause or belief"? ISIS for sure.
Notice this is an "is"-claim: Who is more committed.
Westboro Baptist Church are likely amongst the most devout Christians. I don't think that makes them good Christians, which is what we are discussing.
(Bear in mind that Nawaz received death threats for putting an image of Muhammad on his FB page; ISIS carry out Sharia punishments.)
Bear in mind I had bananas and a protein shake for lunch. Just something random to bear in mind.