Citizen s have the right to bring their relatives here, especially in a dire emergency. The Roosevelt state dept denied them entry because they were Jews.
I think that's a stretch. I'd be interested to see which laws he broke. While it's possible for people here to apply to the immigration authorities for permission to bring their relatives here, it's a multi-year process and subject to lengthy reviews and procedures. They can't just show up on a freighter and expect to be admitted.