Almost anywhere you apply nowadays, if there’s even a modicum of diversity on campus (and, at most places there is) it’s likely to be polarized politically. Trying to thread the needle between schools that are diverse, but, where everyone shouts at each other, and schools where everyone is polite to each other, but aren’t very diverse may be futile.
And, FWIW, Williams and Wesleyan have no business criticizing Amherst for its PCness as both have been in the news lately for their own skirmishes.