Did Washington kill civilians? He was a slave owner. Not sure mass murderer is on the money like it is for Stalin and Mao. Don’t know enough about Che.
Does destroying houses and food supply so that civilians starve or freeze to death count? If so, yes. See the Sullivan Expedition.
During the Revolutionary War both sides committed a number of acts that would be recognized as war crimes today. Washington destroyed Iroquois villages, true, but keep in mind that the Iroquois supporting the Loyalists were outright scalping and murdering civilians. I think you would find little argument that destruction of property, while a bad thing, is a lesser crime than actual murder. Nobody played clean in that war.
>Not sure mass murderer is on the money like it is for Stalin and Mao