Germany was a country ... a country of origin. Islam is not a country.
It is irrelevant, because we had very little immigration (the Great Pause) from 1930 to 1950.
How do you identify Muslims from non-Muslims?
Iraq, Syria, Lebanon and Egypt still have Christians. How hard would it be for a Muslim from one of those countries to claim they are a Christian (Taqiya)?
Cruz's point is we can be selective by country of origin.
If brain dead bureaucrats did the screening there is an excellent point here.
But who says this is the deal. I don’t think Donald Trump, the one who thinks out of the box, does.