You cannot use “incomparably” and “worse” in the same sentence. Worse designates a comparison between two things. Meaning one is inferior to the other. If by worse we are talking about murder (because this is what the conversation was pointed to), let’s look at the numbers: Hitler - roughly 20 mil including soviet civilians Stalin - Roughly 45 million Mao - Roughly 40 million (in a 4 year period) Ongoing Uyghur genocide in modern day Communist China - https://www.bbc.com/news/world-asia-china-22278037 MINIMUM 500K in camps with an estimated 12 million persons who identify in that group. Obviously the government isn't going to actually disclose the REAL numbers.