I didn’t read the whole article, but I can say that U of Chicago (not an Ivy, but prestigious) had a very sizable Jewish presence in both student body and faculty when I attended in the early ‘80s. In fact three of my better friends in freshman year were Jewish guys who lived on my floor, and we took a road trip together for New Haven pizza.
Saul Bellow and Alan Bloom were the most famous Jewish faculty members when I attended (Milton Friedman had left for Stanford). I took courses from able teachers with names like Kass (Amy) and Weiss.
But here’s the thing, they were not Orthodox, and those three Jewish friends have maybe three offspring among them, with at least one having mutilated her body in the current fad. They loved their Chinese pork fried rice and shrimp and cheeseburgers. Their outlook was shaped by reform Judaism, and they are intelligent and financially successful, but not much in the way offspring.
Chicago, all the Ivies, and most private Universities have plenty of spots available for legacy students. Maybe the number of Jews enrolling is declining because the number of Jews is declining in the U.S.
Not as many as in the olden days. You have to be a major donor or seriously active alumnus (or alumna) to think you'll get a legacy spot for one of your kids. Your odds are much better if you are black and a good athlete.
If you look at some of the data from the Harvard-UNC court case you'll find: "Most African Americans fell into the bottom 20 percent of all applicants to both Harvard and UNC, but they were admitted at the highest rate for almost every performance decile, followed by Hispanic, white, and Asian applicants.
Many schools are secretly hoping the Supreme Court rules against Harvard because they have been scooping up all the talented black applicants. Less prestigious school have to work hard to even get marginal minority students. Harvard and Stanford get the top ones.
I had never met so many jews in my life until I started working at MIT. Jews all over the place. Not Ivy League but in the same vein.
But hey, they apply themselves how can you argue with that?
Fun Fact, four friends from the Little League World Series Champs in 1989 (including Chris Drury, ex NHL player) bought the Colony Grill.