He also refused entry to refugees on the St. Louis fleeing Hitler, choosing instead to send the Jews back to be gassed.The difference is that FDR imprisoned US citizens without trials in violation of the Constitution. A reasonable case can be made for interning Japanese, German and Italian nationals residing in the US, it was customary and in accordance with international law. But there was no legal basis for incarcerating US citizens.
Imagine how those people felt. Going up and down the coast, so despised because they were Jews, that people preferred they be killed Instead of granted entry to their country.