Why do blacks hate slavery?

This may sound like a stupid question.

Yet I'm wondering why do they hate slavery,
after all if it weren't for slavery in the U.S.A,no blacks or hardly any would be in my country today...

Of course evolution occurs in humans, people who are logical and understand this yet still argue over racial issues tend to be discussing semantics rather than any specific scientific point, there are many mixes of races, many of which are not recent at all such as the spectrum of arab to negro as you go down the nile, there is also the fact that differences between individuals are greater than differences between races which adds significance to any debate on how to respond to racial differences.

Get shocked if you want, I'm not afraid of telling the truth. The truth is, reality is racist, just not very racist and not racist in the sense of "ARYANS ARE SUPERIOR". Racial differences are only really apparent when individuals are pushed to their theoretical limits for a particular ability, like 100 meter sprints or some medical niche like the prevalence of blood types or lactose intolerance, furthermore advances in genetic science mean that eugenics is obsolete, procedures such as embryo selection can eliminate harmful genes without the need for inhumane actions like forced sterilization.

This is the thing, we should be discriminating against individuals, not races, an educated professional in India shares the same values as every other businessman, scientist, broker, lawyer, accountant, engineer, doctor and dentist, they all know they know better than the poor and desperate who need capitalist free markets to get out of poverty but who often fall prey to charlatans. We need to stop this ridiculously notion that the world has to be about races competing for resources and focus on the real enemy, the ignorant and stupid in every country.