A more accurate analogy would be that there are no "good" Germans. Do you know for a fact that all arabs, even Muslim arabs are believers of the crap that Muhammad preached. More than half of the Christians in this country dont have a clue what Christianity is about. All most believe is that Christ died on a cross and if they are good they will go to Heaven when they die. Beyond that most only know the bible stories from Sunday School. Do you believe the average Muslim is more devout than the average Christian?
Yes. Their actions speak louder than words.