The first mosque in London appeared in the 19th century. It's purpose was a little different then - it was kind of like setting up a stand at Epcot Centre, except our researchers were trying to study it.
There are loads of mosques in America. You clutch as many vipers to your chest as we do. I'll take your criticism of our immigration policies seriously as soon as one Represenative, Senator or Governor starts actively calling for the deportation of your Muslims, which are obviously just as dangerous (remember the blind imam behind the 1993 WTC bombing?) as ours are.
Regards, Ivan
How about an example of a US Representative calling for deportation of "illegal aliens", in general?
http://www.freerepublic.com/focus/f-news/1448211/posts