Matt 11:20-24

Also Matt 10:35,  division of the family, 

Bringing the sword

Taking all that together, if we want to apply Christian principles to immigration, then we ought consider that Jesus didn't seem to be a fan of ecumenical/humanistic multiculturalism.  

Instead, Jesus did welcome the stranger and outsider, but only if they were in harmony with his principles.

Therefore, WWJD if he were in charge of U.S. immigration policy?  Christian immigrants before Muslim.