"Terror source" countries? Ridiculous. According to People magazine (why not?): 

"Trump’s ban did not include any of the Muslim-majority countries where the Trump Organization — which is now being run by his sons — holds business interests. Those countries reportedly include Saudi Arabia, Egypt, Turkey, the U.A.E. and Azerbaijan.

Here’s a look back at the major terrorist attacks that have taken place on U.S. soil since 9/11, including the nationalities of the perpetrator, or perpetrators.

Of this list, zero fatal attacks were carried out by immigrants from the seven Muslim-majority countries targeted by the ban."

Moreover, it's accurate to call it a Muslim ban because not only are the targeted countries predominantly Muslim, but also, Christians from those countries are exempt.