It's the opposite. In a poll, WASPs gave Jews the 2nd highest rating (69, higher than Catholics, rating only themselves higher at 82), while Jews rated themselves at 89, and gave Evangelical Christians the lowest rating, 34.

In other words, WASPs have a positive view of Jews, while Jews have a very negative view of WASPs.

Source: https://www.pewresearch.org/religion/2014/07/16/how-american... 2nd table

In fact, no country has a more positive view of Jews than the US (at least among those polled by Pew research): https://www.pewresearch.org/global/2008/09/17/chapter-1-view... - 2nd graph

But this sampled all US residents, not just WASPs.

That’s counting evangelical Protestants, which aren’t “WASPs” in the context of elite northeast educational institutions.

Random Americans feelings of "warmness" isn't the same as admissions officers decisions.

There's no evidence of anti-Jewish bias in Ivy League admissions (the opposite, in fact), and polls also show friendly attitudes towards Jews among the general population, so I don't know what it would take to convince you.

On the other hand, Ivy League students are only 33% non-Jewish white, and 4-5 of the 8 presidents are Jewish, per their wikipedia pages (Martha Pollack is listed as Jewish, but the citations in support of that claim are ambiguous, hence the uncertainty), so what makes you think that admissions officers are the exception where WASPs reign?

I wonder if the college administrators who enforced quotas on Jewish students would answer similarly (not being sarcastic, I generally wouldn't be surprised if they said in a survey that they had warm feelings towards the Jews)