No need for questioning anything: just look at history! Europe, for example, Sweden as a "for instance". Look at how the Muslim population "navigated" into their society and then took it over. Complete areas that are wholly self-contained. C'mon guys, don't forget history so quickly. This technique has been used successfully for centuries, and it's not going to be any different here on our soil.
As to the political "solution" discussion. Give it up: the Rs and Ds are just two wings of the same dirty bird. There's no political solution to this nation's problems.