Actually, the smarter of the terrorist groups generated whole textbooks on how to use the political correctness ploy. When captured, immediately claim police brutality and religious oppression (no barbecued camel on demand)...claim that innocent seeker of "American Dream" being victimized by racism.
They can't keep it up, though, all it takes is a little prod and they start spitting hate of Jews and telling absurd conspirtorial stories of supernatural Jewish control of America....wait a minute--this is beginning to sound like my son's history professor!!