I mean, if we are arguing as to whether or not to believe the authorities, we can just take the word of their guru in his interview with Ami. Mind you, Rabbi Frankfurter tried really hard to paint Lev Tahor in a positive light but there were certain things that there’s just no good way of saying it. Like when asked about the allegations that kids are taken away from their parents, the guru openly admitted that it happened and gave a hand-wavey non response basically saying “We admit that there may be better ways to do chinuch”. When inquiring about the arranged marriages of 13 year olds, the response was “Well, they are gedolim according to halacha!”.
And it’s not anti-Semitism either. There are a thousand thousand different Chassidishe groups out there, and you don’t see the frum oilom unilaterally forming against them. Nor do you see authorities swooping into New Square to declare the parents negligent.