Aw, thanks you guys.
I’ll add to that a chain migration point–Muslims in the Arab world frequently have very large families. Assuming the US lets in an Arab engineer or scientist because he’s “skilled”–I. E. cheaper than an American, as well as more of a terrorism risk–he’s entitled to bring in his adult siblings. All twelve of them.
How many children do they already have? How many wives? How many kids will they have in the US? It’s a big long chain, and it’s around the neck of the US taxpayer.