I've read some of the biography of Nestor Makhno, he fought those who were simultaneously trying to stop atrocities of reactionary 'whites' and reactionary 'reds'.
"I didn't think we're striving here toward pure anarchist thought, to the extent that we need to draw up our denouncements lest people become confused or fearful of where we're going with it. Ditto for Bolshevism. "
I agree we're not striving for ideologies here, however it is important that self-described anarchists, bolsheviks, and westerners today clarify they don't agree with atrocities of any names/leaders previous.