And? That clearly blames the Makhnovists.
https://www.amazon.com/Nestor-Makhno-Eichenfeld-Massacre-Ukrainian/dp/1894710460
So you've read it? How about https://www.amazon.com/Nestor-Makhno-Eichenfeld-Massacre-Ukrainian/dp/1894710460
in which Makhno had all the men of a Mennonite village executed?