“To label it a despicable lie, and then to, more accurately, state that you don’t believe it – leaves you comment self-contradictory. You are free to not believe. But until you verify it as false, you should not label it a “despicable lie”.
That’s how some Litvacks (neo-Litvacks really) talk. A bit over the top, no? A bit aggressive, no? That’s one reason Chassidus was started, to counter such a hostile attitude.