Two things worked in conjunction against us in Africa primarily.
1. We simply didn't have the weapons. The Europeans had far advanced weaponry (guns, cannons) at the time.
2. Tribalism. Nigeria for example, was never supposed to have the borders it has today. It is artificial. The Hausa/Fula in the north have never seen the Igbo or Yoruba the same. Skin color wasn't a unifying force and is was a conquer and divide strategy that had worked for France and England (native Americans, India,) over and over again.
Africa could have overcome 1 (weapons) if they overcame the 2nd (tribalism) with numbers. Africa had the numbers but the Yoruba and the Hausa had never gotten along for hundreds of years and both would rather fight alone or cooperate rather than unite against a common enemy. The Indians started doing that but it was after it was too late.
Anyway, power has almost always been abused when its a whole people having it. As far as anti-semitism labels and if you notice society including non Jews (white folks, etc) go extra hard on us for two reasons.
First, if they are European/Ashkenazi Jews, they want Judaism to have a white face. If it was all about the religion they would not be treating the Ethiopians, Yemenis and other non white Jews in Israel like sh*t. Don Sterling, former owner of the Clippers said as much in private. NO ONE said anything about that. NO ONE. He said we treat black Jews there like dogs. So, all these white Jews know that. They want Israel to be a white ethno (Jewish) state and you can't make people psychologically accept it if there are non White Jews and if the original prophets are non white, brown or black. There NO WHITE PEOPLE IN THE OLD TESTAMENT. NONE. I defy anyone to name one white person as we know it. I am not talking about groups of people that have been given white status. but were not originally accepted as white (Persians, Arabs, Egyptians, etc). I'm talking about white people, Europeans originally accepted as white. Moses was from the line and his wife was a Kushite which is present day Somalia where they are blackety black. (beautiful women by the way). Many other examples.
Second, whites and other non blacks will take any opportunity to make us the bad guys. We are supposedly more homophobic, more antisemitic, more anything bad so that when the reparations claims come they can do the 'what about?' game. One of the tools of anti-black racism is to take away Blacks victim status.