Don't forget we are a melting pot country. I don't know if I know anyone that came across the Mayflower.

In Europe, like France, the countries are smaller in comparison and the population's ancestors go back hundreds of years. I don't think French citizens are all that friendly and I remember reading about the French spitting on Muslims.

"To be sure, a majority of Muslims and their children are well integrated into American society, and we should welcome and encourage their continued assimilation. However, the attacks in both France and the United States are a stark reminder that mass immigration sometimes sows the seeds of violent conflict."
Muslim Assimilation Failed In France. Is It Failing Here, Too? | Center for Immigration Studies