They hate the West. Why are they here ?
Based upon the ones I have met at work, they moved here because life is easier, most of the men are college educated and there is no work for them in their home country. Problem is they get here, move the family here and find that nothing is like back home. Everything from language, basics like food and housing is different Here, they are a minority and that is very uncomfortable. In their culture, the most agressive usually get what they want and they try that here it is viewed as hostility. They try to keep their culture and language and do not try to assimilate. Being separate and apart from the society in which you live causes alientation and anger.
After 9/11 I know my heart skips a beat when I see a large number of them at a mall or shopping center.