The presidents of Yale, Pennsylvania, Harvard, Columbia, Princeton, and Brown are Peter Salovey, Amy Gutmann, Lawrence Bacow, Lee C. Bollinger, Christopher Eisgruber, and Christina Paxson. They are all Jewish (don't take my word for it - check their wikipedia pages).

If you contend they are discriminated against despite holding at least 6 of the 8 presidencies, and despite being by far the most over-represented group, I assume you have some fantastically strong supporting evidence.