To believe that Hitler acted alone is a problem. It is not hard to find the evidence linking Islam, Nazism and the liberal left-a union that OFFICIALLY began pre-WWII. Mahoney's book provides the evidence-but it's rather easy to find on your own if you are willing to accept the truth.
It's not difficult to find Arabs falling in line with Hitler, but Hitler made the first move.
Hitler really didn't need the assistance of Moslems to come up with his crap.