Why cant black folks just take the time to say...''thank you,white man'' ?

if it wasn't for us they'd still be in africa shooting spears at zebras and dying of famine but we brought them to a new world,Taught them how to be civilized people and not act like savages, showed them how to cook and eat with kitchen silverware,how to dress casually(jeans/shirt) and not run around in zebra bikinis. We showed them basically the whole light to what it is to live in a civilized environment as authentic human beings not animals. So instead of point your fingers and say '' i hate the white devil'' why cant you guys just say ''thank you..for everything you done for me and my people'' Because if you guys lived in africa you wanted have these many open opportunities to better yourselves. hence; Africa is poor and most people there are illiterate.