Because I live in Spain every few months I get some Euroweenie trying to lecture me on America’s ills. Slavery, mistreatment of Native Americans, etc. All I do is point out that at the times in question virtually every American had either come from Europe or was a child of people who came from Europe. So where did they learn to be so cruel? That usually ends the conversation.
Ask the Euroweenies what Francisco Pizarro did to the native Peruvian population.
Spaniards give you grief? Kettle - Black.
I tell my Lefty friends it took America some eighty years and hundreds of thousands of lives to rid itself of the British institution of slavery.