Would a fair synopsis of your view be you don't care what people want because you know what is best for them?
No, a synopsis of my view would be, essentially, that I am not interested in what they want. What they want hurts other people and I seek to prevent them from getting what they want. Whether or not the ability, even if they do not exercise that ability, to kill people based on race is what's best for them then I do not want them to have whats best for them.
That is what I get from your responses.
You are wrong, I do not care that every single individual may or may not get what's best for them. I care that fundamental needs are met and that the technological, cultural, societal, and economic progress of humanity as a whole improves over time. Someone is probably going to get fucked over in some way or another and that's unavoidable in any system including yours.
One size fits all requires totalitarianism.
That I have a pretty hardline stance on racism and mass murder does not mean that I don't think there should be no acceptance of any choice or variation on other issues.
There won't be any freedom of choice in your world.
There are always constraints on freedom of choice. You can't choose to not eat or drink water, you can't choose for 2+2=5, and I want to constrain certain choices like the ability to genocide people over their skin color.