What do you mean? Barack Obama, George W. Bush, and Bill Clinton were all working around the clock trying to solve the illegal immigration problem. /sarc
Yes indeed the were, problem is their idea of solving it is the problem.
Muslims in Britain probably won't assimilate.
If they do, they'll be a lot more violent about it and will take much more time if they don't destroy Britain in the process.
Of course, that's just assuming the Brits have the stomach to coerce their assimilation...