The two key US Senators who initiated the immigration nightmare were Ted Kennedy and Jacob Javits, obviously Kennedy was Catholic.
However at that time they were changing the rules for legal immigration in the 1960s.
The illegal invasion is of more modern origin.
“...Ted Kennedy and Jacob Javits, obviously Kennedy was Catholic.”
And, haha, obviously Javits was a Jew!
But yes you are right, they were expanding legal immigration, and well-considered or otherwise, that has nothing to do with millions of persons, of whatever persuasion just entering our nation illegally.