Talk to Greenblatt, he thinks America is full of white supremacists because they wouldn't mind retaining their own identity, but thinks Jews can pick and choose in Israel.
Anyway, many of the Jews claiming it as theirs relate to the original Jews, who left the region, in name only. They've been everywhere since, some people have adopted the religion, married into different groups and passed it down from there. Super tenuous in my opinion, but when you've got political and financial control of America, you can convince people of anything.
