Why do most people radically downplay the impact of Christianity in leftist thought to an irrational extent?

(I will mainly talk about Christianity & anarchism here as I don't know much about other leftist theological movements, but there is still so much to talk about.)

I've recently become a Tolstoyan (a form of Christian anarchism based of the writings of the Leo Tolstoy) and the impact that even this tiny sect has had on the world disproportionately outweighs the minute amount interest and discussion on it even when taking into consideration that it is leftist and Christian.

Like how the hell does no one know about the fact that Gandhi felt so inspired by the writings of Tolstoy that he went down to South Africa to set up an anarcho-christian commune and cited his experiences as one of the biggest influences on his belief of non-violence & vegetarianism? How do so many prominent people like Ludwig Wittgenstein, Gandhi, MLK, Trotsky, and Tolstoy (ofc) write extensively and lovingly about a religious movement while it continues to be foreign to even the most theopolitical academic circles?