They get here, they get a job in Immigration, they breed, they let more of their kind in.
Happened (and continues to happen) with Mexicans, now its happening with Muslims.
All blessed by our Communist Overlords.
Meat-packing companies, the State Department, and private "charities" have huge programs that specifically target Muslims for immigration. This is all legal under current policy. Until immigration scandals are exposed and laws are reformed, there is no "war on terror."