Sorry, but we do have quotas. We're just not vocal about them.

edit: No, we actually don't, my mistake. But there seems to exists unofficial expulsions and regularization quotas to meet every year.

Look up Dearborn Michigan

"As of the 2010 census the population of Dearborn was 98,153. The racial and ethnic composition was 89.1% Whites, 4.0% black or African-American, 0.2% Native American, 1.7% Asian, 0.2% Non-Hispanics of some other race, 4.0% reporting two or more races and 3.4% Hispanic or Latino.[14] 41.7% were of Arab ancestry (categorized as "White" in Census collection data)."

Sorry, 50k is not massive, let's talk about a couple of millions.

The Muslim influx was a result of colonial France. Britain has a sizeable Muslim population which is doing relatively well. The problem was discrimation and non-integration. Muslims (of North Africa) are unfortunately INA similar position as blacks in the USA.

The only common factor being their economic status.

But the Arab French have integrated culturally and are highly successful artists, athletes, businessmen, etc. Its only a matter of time before they deliver on the promise of immigration.

P.S. I'm a Muslim of South Asian origin born in Saudi Arabia.