[Jewbacca]

Sure.

Some anti-semite wrote a quack book “13 Tribe” 100 years ago that proposed the Khazar theory, and Stormfront and the residents of Arab-occupied Judea in the West Bank routinely cite it, even though it has no serious proponents and has been disproven by multiple different DNA studies.

I was actually a participant in one study (I am Tay Sachs positive), so I have first-hand knowledge of how silly the claim is.

[x]

Some anti-semite wrote a quack book “13 Tribe” 100 years ago that proposed the Khazar theory, and Stormfront and the residents of Arab-occupied Judea in the West Bank routinely cite it, even though it has no serious proponents and has been disproven by multiple different DNA studies.

Arthur Koestler who'd been a Zionist in the 1920s wrote The Thirteenth Tribe in the 1970s. His idea has been disproved and some critics called Koestler a quack at the time, but it wouldn't be fair or accurate to call him an anti-Semite.