Good question.  I once knew a Lutheran who was surprised to hear me say I was Catholic first and an American second.  The answer to that question may not be as uniform as you might think.  But despite my being Catholic first, there is no tension (on the issue of immigration) between my being Catholic and being American.  There isn't if you keep certain facts in focus:  1)  These are God's children.  They're entitled to love, compassion, and respect on that ground alone.  2)  # 1 does not entitle them to be here legally.  Every nation --- Christian or non-Christian --- has borders that must be respected.  Short of true necessity, as when a shipwrecked seaman swims to shore on Cape Cod, on land owned by the Kennedy family, aliens have no right to be here without following the rules.  What we have seen is not so much strict necessity as sheer desire.  Lots of people would desire to be on the Kennedy compound.  That bare desire confers no rights.