Lev Tahor are chiroptera dung crazy even by charedi standards. They've been chased out of Israel for being oppressively religious and ignoring all the laws. And when you consider that Satmar and the Gerrer Chassidim are accepted that's an accomplishment. They have proceeded to get kicked out of every country they've moved to for law, child care and education standards, and a bunch of other violations.

As you would expect, they like their girls to be married before their permanent teeth are all in. They also, unlike every other flavor of Judaism, where burqas. They also believe that Jews should always be an independent religious community in other countries, not beholden to the legal system. And they support the forcible extinction of Israel and Israelis (although they were happy to take welfare payments from the government).

In short, cult with a capital "Toxic".