So killing Christians, children under 12, women, even fellow Muslims who don't believe in their declaration of the Caliphate aren't heinous enough for you to make the comparison?
You are aware, are you not, that the Nazis did exactly the same things? Jews and homosexuals weren't their only victims. In all, 11 million people died at the hands of the Nazis. Of those killed during the Holocaust, six million were Polish citizens. Three million were Polish Jews and another three million were Polish Christians. Most of the remaining victims were from other countries including Hungary, Czechoslovakia, Ukraine, Russia, Holland, France and even Germany.
Jehovah's Witnesses. Roma Gypsies. Resisters. Priests and Pastors. The Disabled. Blacks (and black children who were not killed were sterilized, ala Margaret Sanger). Any Aryan German married to a Jewish spouse was given the choice of divorcing or going to the death camps.
Sounds like ISIS to me, only (thus far) worse. But give ISIS a chance. I'm sure they can catch up.