Okay, that clears that up. So, this article says that the report is from a German "China scholar" named Adrian Zenz. According to his wikipedia article, Zenz is a senior fellow in China studies at the Victims of Communism Memorial Foundation (which upholds the 100 million deaths in an unprecedented imperial holocaust line), as well as a lapsed Catholic-turned-born-again Christian who has stated that he feels "led by God" in his research on Chinese Muslims

So in other words, pretty much just a lying ghoul