“I happen to have no information in this case, which is why I didn’t post anything. Except that I think one of my roshei yeshiva was talking about them once, and seemed to think they were way off the spectrum”
Re-read your first line. it is the most important thing you wrote. Your particular R”Y’s personal opinion is just that – his opinion, and he may think as he pleases. But that is not a reason for you to assume his opinion is correct, and “way off the spectrum” does not equate with Hellenism (though you did not call them that). They might march to the beat of a slightly different drummer, but they are nonetheless marching to a Torah beat.
They do seem to intellectualize quite a lot, but they certainly are unquestionably shomrei Torah u”mitzvos, from what I have observed. They do not typically dress in the Yeshivish style, but the women cover their hair, go to mikveh, and they all keep Shabbos and kashrus, send their kids to yeshivah, and support Torah learning as other frum Jews do.
Think what you will, no one has control over your thoughts. But IMO it is wrong for any of us to write such disparaging things on a publicly read forum, about people who are frum but different from you. And if any YBT talmidim read this column, I hope they answer these comments. Maybe their hashkafa is not 100% exactly the same as my hashkafa, but they are certainly within the confines of halachic observance.