AinOhdMilvado,
I live in a county that already probably as more Muslims than Jews; I see Muslims frequently on the street and on public transit vehicles. I walk past mosques and halal slaughterhouse. Not once has any Muslim ever treated me with anything other than the greatest of respect. I have spoken with Muslims about our respective fasting rules (they can’t see how we can fast for 25 hours; I can’t see how they can fast for a month at a time). My wife has compared experiences of hair covering and modest dress with Muslim women.
France is far from “overrun” with Muslims — the Muslim population of France is at most 12%. The big problem there is that the Christians hate the Muslims as much as they have hated Jews. France has always demanded a higher standard of assimilation of its immigrants; the American standard in which immigrants are encouraged to keep their culture is far better. (Note that it indeed has worked out much better for Jews in America than in France!)
Furthermore, regarding the location, there exists an existing mosque two blocks from the proposed site that is currently overcrowded, it has been there since 1970. What is different about two blocks?