The British imperialists genocided more people throughout their history than the Germans. Just that the Brits took their time with it. The French, Spanish, Portuguese, Belgians, Dutch and Italians also have many million skeletons in their closet and the French massacred millions of people trying to gain independence after World War 2.
If you go to any place in the world outside of Europe there is a good chance that Europeans committed a massacre there to steal land and resources at some point in the past few hundred years.