The head of ISIS has a Ph.D. In Islamic studies. Perhaps he should know what Islam is?
This is similar to the argument Communists make. “Cuba is not real communism. The Soviet Union was not real communism.”
Faced with the demented butchery their ideology creates rather than admit error they retreat to that old lie.
I’ve heard the “real communism” garbage before too. Of course, when such people have abolition of family, religion and private property thrown at them, never mind Lenin’s statement about hatred being “the basis of communism”, they are thrown into paroxysms trying to explain any of it.