Obviously his POV is far from popular. But have you actually read his own works? Plus, I really very much doubt there exists a book about WW2 that can be taken without a grain of salt.Everything I've ever read or heard about that guy has been incredibly critical of him and his...methods.
He is likely only right to a degree (like we all), but personally, I find his ideas credible, because what he says USSR was up to in Europe, was basically what they actually did in the Baltics.