Yes, but since the USSR was on the "winning" side they largely got a pass because winners write the history, as always.
Stalin's policies were just as genocidal, they were just rooted in slightly different areas.
I still don't understand why some people want to deny it happened. Is it that they can't believe their "all powerful conspiracy-running" scapegoats were ever victims, because they see them as invincible devils? Do they think it's a false cry for sympathy from people they believe deserve none?
The evidence is not in dispute, the cameras FILMED it in an era when you could fake a photo perhaps, but not thousands of feet of footage.
Unfortunately, WWII was not the last incident of mass genocide, as Africa has managed to repeat in Sudan and Rwanda amongst other places. As long as people insist on seeing "us" and "them", on dehumanizing other people because of real or perceived slights, it WILL happen again.
The children are inheriting the prejudices of the parents and it must STOP.