Our Founding Fathers must be looking down at us from above and weeping rivers.
You are over-reacting. Some of these quaint and colorful Muslim tribespeople only have 15 or less children, which isn't bad when spread out over 4 wives. Getting them here and setting them up to take jobs from our own native low-enders won't cost much either. Probably only $250,000 per family or so.
The taxes they pay on their new jobs will probably pay this paltry sum back in a matter of just a few centuries. So, what is your problem?
Oh wait, you're one of those people who think these folks might have been better off being settled in Africa, in some rich farming area? One which has been de-populated by AIDS?
Please, do us all a favor. When you feel thoughts like that coming on, go lie down. They will go away. Using common sense in these discussions is politically incorrect and could land you in a heap'o'trouble,boy.