Exactly.
And we had immigration down to a pretty comfortable level... until the Catholics decided they were tired of being repressed and Teddy Kennedy pushed through the immigration act in 1965. Then the floodgates were opened and we’ve been going downhill ever since.
We were bringing in 250,00 to 300,000 a year from 1924 to 1965. Then the Immigration Act of 1965 was passed to make the population of the US look more like the rest of the world. It was part of the Civil Rights movement and really wasn't caused by Catholics.