All of those things listed has been adopted and supported by the majority in their countries outside of apartheid which was propped up from outside that country. Which pales in comparison to what happened in Germany, China, Russian, Ukraine, Cambodia, Vietnam, etc. "Minorities in parts" is so insanely arbitrary. They may have been minority in that area but not those states. Every single movement at the tops is a small few. It's called the Pareto principle. Look at the muslims in china right now.This is also not true. Apartheid was enacted by a minority. Countries like Ethiopia, Iraq and Zimbabwe were forced into dictatorships by minority groups. The Nazis were also a minority party in Germany before they murdered many of their political rivals and took advantage of a crisis to grow their popularity. The Red Scare was engineered by a small minority of members of Congress who staged a reign of terror to ruin people's lives. The "Gang of Four" in China used their influence as a committed minority to murder and imprison their political enemies. White minorities in parts of North and South Carolina and Oklahoma staged bloody riots to lynch and takeover cities run by black majorities. History and politics just aren't reducible to such simple just so tales and maxims. Few other countries have an analogous senate and somehow don't manage to annihilate minorities.
I also agree that few other countries has something similar to our senate. I am ok with that. There's no place on earth in literally all of human history that has been as egalitarian and as prosperous to minority groups as the one we currently live in. The senate is a big part of that.