The trick is to not import enough immigrants that they're able to form insular little communities. America's Muslims are fewer, so they are assimilated by our culture.
And it's our culture that is the key to ending the menace of Islam. My friend in Iraq makes a lot of money on the side by selling things like porn magazines and booze. Once our culture seeps in some more, and the people have a healthy level of decadence and skepticism, we'll see a much more peaceful Middle East.