An extremely small number of people were involved in those. And meanwhile, China was extinguishing anti-communist dissidents by the millions in the Mao revolution. India had its caste system in full effect. Africa was even poorer than it is today with many battles, regional strifes, etc. Cuba got taken over by communists, for example, many forced to flee to the U.S. afterwards. They didn't seem to worry about the "prevalent lynchings" as you characterize it, or exaggerate it beyond its relative scale in what was going on in the world at the time.
Europe was majority white and even in the Fascist Spain if you declared yourself Catholic, pro Spain and such, no one would give a shit except for propaganda ("look, a remote blackie from Africa being happy in the regime, we are a success").
