Sometimes people look at this blog that might not know the distinction between true Torah learners and counterfeit Torah scholars that are demons. Usually I assume people know the difference.
But just in case the basic idea is this: true Torah is based on the Gra and regular striaht Litvak yeshivas and false Torah of the Sitra Achra [Dark Side] is from the cults the Gra put into excommunication.
Also have to add for the sake of clarity that Reb Nachman was not included in the excommunication.
[Normally I would not even bother to mention this, but when I see people looking at this blog from Indonesia I feel adding some clarity would be helpful.] [Most of the time the only readers I see I from the USA or the former republics of the USSR and also from Italy.]