Because Iraq is a Muslim country and such behavior is more commonplace with Muslim immigrants who are not interested in integrating to a country they chose to migrate to.
Chances are this Iraqi immigrant wasn’t a Chaldean/Assyrian because Iraqi Christians don’t engage in this behavior like the Muslim Iraqis often do.
Sorry if that may seem ‘bigoted’ to you, but I suppose the truth hurts.
Coming from someone that hates non-Muslims, you should be the last to talk.