I believe that illegals from the Middle East are an immediate threat and must be found and deported but a draconian roundup of all illegals would not be possible or as productive as concentrating on the followers of Islame.
Let me know when Mexicans start diving planes into skyscrapers and I will join your jihad against them. But until that happens they are on the back burner until the principal issue is dealt with.
French-speaking terrorists jump over the border from Canada. In fact, the WTC bombers came in from quebec and started out in Maine, of all places.