That's long been a problem throughout history, not only for former Muslims. Though speaking of nowadays, you likely are on to something in that it can be more difficult to shed particular imprinted patterns and ways of thinking for those coming from Islamic cultures, with my own objections being along line of "your mileage" not may, but will vary.
Present-day cultural pockets within the United States can tend towards similar, roughly parallel serial failure in society (and parents) teaching and providing coping mechanisms which can be relied upon to avoid physical violence. Also, there truly are concurrently running, virtually unwritten but yet strongly imposed codes of conduct, that if one crosses (or is merely appearing to approach crossing) can lead to immediate fighting.
At least there was in Texas. A code of honor. Behave. Be polite. Or it will begin. It's not so much like that today, although this can be difficult to describe in words. It's like one has to have lived through it to understand. Those who are old enough coming from many places within the US can probably accurately enough grasp what I'm saying, the culture as a whole fifty years ago having not been entirely dissimilar due to intrastate US provincialism, and how many aspects have since changed.
Prior to (and continuing for a brief period soon after) the Council of Nicea, supporters of Alexander and Athanasius began persecuting (even to death) those who sided with Arius, and of course there was fighting, and not only a few killings too committed by Arians in return.
As some historians have noted, the sainted Athanasius not only did not condemn that sort of thing, but rather excused it --- until it was his own turn to be the hunted (which he later became, and remained, on off and on basis).
That was the first time in history within the Christian Church violence was condoned, if not said to be justified over issues chiefly of theological disagreement.
Later it went the other way of course, against the Arians, with requirement towards holding orthodox views enforced in a variety of ways, many of those not pretty, not pretty at all.
Just saying. Something to remember.