Never said that. All atrocities are bad and for sure western powers have committed the most harm by number to themselves and others, by percentage I’m actually not sure. It’s partly a function of recent growth of the global human population. These things were happening since forever but there were many fewer people. I’m not saying that’s the only factor. Technology to sail and use guns as well as mainly zoonotic diseases played a massive role as well. Once again, all atrocities are bad and shouldn’t have happened. People should work together for their mutual benefit.