The U.S. did not increase quotas to specifically help Jewish Holocaust survivors until 1948. Non-Jewish displaced persons including some perpetrators also came to the U.S. in large numbers.
The subject of the survivor biography I am writing reached New York in 1951, eight years after he as a 10-year-old escaped the extermination that wiped out his family and entire community in Poland. Most of that time he was in DP camps in Germany because he couldn’t get into America.
I know. That is the rub. Groups like the ADL typically bemoan the lack of a change.