Posting a new working paper, co-authored with the brilliant @lauraroyden.

"Antisemitic Attitudes Across the Ideological Spectrum"

We conducted survey experiments on 3,500 Americans, including a large (2,500) oversample of young adults (18-30)

LINK: https://www.eitanhersh.com/uploads/7/9/7/5/7975685/hersh_royden_antisemitism_040921.pdf

First part of the study: measuring overt antisemitic attitudes (Jews have too much power, their businesses should be boycotted, they are disloyal).

High antisemitism on the young far right (much higher than on the young left or the older right)

Also found high level of agreement with antisemitic views among Black and Latino identifiers across the ideological spectrum. At every level of self-reported ideology, Black/Latino respondents (especially young respondents) more likely than whites to agree with these statements.

Antisemitic attitudes, we find, aren't tied closely to views about Israel. E.g. For those who said Jews have too much power, we asked in what domains. The red below are those who said too much power in Israel/Palestine conflict but no other domains.

The second part of the study is experiments about "double standards". Here we see an anti-Jewish double standard on the far left (20% of young adults identify as most left on a 7-point scale), and an anti-Muslim double standard on the right.

Across all parts of the study, what stands out most is how the young right differs from older folks on the right (and differs from the left) with respect to Jews and Israel.

Lots more detail in the paper:
https://www.eitanhersh.com/uploads/7/9/7/5/7975685/hersh_royden_antisemitism_040921.pdf

Adding 2 points, obvious if you read the paper, but probably not obvious in tweets.
1.) We did NOT conduct this study assuming we'd find low levels of antisemitism on left, high on right. Much of the design (oversampling 18-30 yo, asking abt identities like leftist, etc...

...asking about "double standards", were all there because they are central to public discussion of left wing antisemitism. We took those hypotheses seriously. But for the most part they werent confirmed in the data...

2.) Too much of the discourse around antisemitism is based solely on competing anecdotes. @lauraroyden and I are trying to move to more productive ground of testable, falsifiable claims.

That doesn't mean our measures are perfect.
If you have better ideas, let's test them!