Whites only founded this nation. Blacks built and by virtue of their work funded it.
Well, technically, migrants from Asia crossed a once formed stretch of land between what is now Russia and Alaska and founded the Continent.
As for founding our government, I suppose you could point in part to England. If it wasn't for their oppression, we would still be having high tea and speaking with British accents. So, thank your England for your heavy-handedness.
The actual Constitutional government was founded by still somewhat primitive mindsets. Slavery had been abandoned in some areas of the world, but not all. Hell, the last official ending of slavery was in Saudi Arabia and Yemen....the year...1962. Anyway, some of the founding fathers were more forward thinking and wanted it ended, while other founding fathers saw the end of once purchased free labor being lost. Their reasoning was the bottom dollar....literally. But there should be no squabbling by blacks about slavery. It was done everywhere and in this country, has been gone for well over a century. Thousands, including black regiments fought and died to end it. Period. As for the rampant racism that kept going after that, well....look no further than your average Dixiecrat Democrat and his/her fellow associates. I guess I will never understand why they just won't let the Civil War go and keep thinking that slavery was acceptable. They're just dumber than rocks I guess.