Englands Fault!
Had the Crusades been ‘finished’
we wouldn’t have a Muslim problem.
(Ancient) Israel's fault!
Had they heeded orders, and utterly destroyed the Hittite, the Hivite, the Amorite, the Canaanite, the Perizzite, and the Jebusite from the land....
No, let's go back a bit further:
Abraham's fault!
He should have disregarded Sarah; believed, and NOT 'entered in unto Hagar', producing Ishmael, leading to MadMo.