Unfortunately, Moscow, because of the stressful conditions of the 1930s and the fear of an anticommunist reinvasion, did indeed cause collateral damage in some of its attempts to suppress counterrevolutionaries. Such overreactions are the inevitable consequences of a revolution regardless of it agenda. Even so, the way that Moscow handled disagreements was complex.
There is more that I could add, but I don’t see the point.
If you really want to understand communism, watch G.P.U. I guarantee that by the ending, you’ll revise every single thing with which your cultural Marxist masters indoctrinated you.