So what? My country was founded with the help of the Christian religion and it was based on wars against Spain and lots of massacres happened. A few centuries later we created an empire along with the Brits, Dutch, French, etc and we repressed lots of people. We justified it with religion, with genetic superiority of whites, with higher intelligence and development. It doesn't matter. Shit happens. Do you think it is a coincidence that some environments create more extremists than others? Do you think that because ISIS was presented to you as the Islamic state there isn't a history of politics behind that includes the intervention of the west with puppet politicians? Do you believe it is a coincidence it all started to grow with the fall of the Ottoman empire?
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you
