What would be your surefire cure to make bigotry obsolete?

Exterminate the entire human race. It's the only way.

Even if everyone on the planet was absolutely identical to everyone else in every way possible, people would still hate each other. It's ingrained into the species.

Eliminate people.

Teach critical thinking and reasonableness.

Simple.

Eliminate people. No people, no bigotry.

Unfortunately if you have people, you will have bias. If you have bias, you will have bigotry.

Of course false accusations of racism will devalue the term, until it no longer has any meaning. And at that point accusations of racism or bigotry would be meaningless.

To call someone a racist for opposing a political program will eventually make acusations of racism against those who commit violence against people of other skin colors illogical. For example. If a black youth beats up a white youth for wanting to sit next to him on a bus, that isn't racism. But if someone doesnt want one fifth of the economy taken over by the federal government, that is racism.

I hope that makes it clear. And if it doesn't, is the problem the amount of melanin in my skin?

Genocide - kidding, of course.

Forced lobotomization.

But that's not very ethical.

And Big Brother can kiss my ass.

violence

Send robots to abduct and perform neurosurgery on every person on the planet who could have such done to them that implants wetware that links their minds to each other in every detail, wire the mass of minds to a master artilect, and kill the rest, thus creating a hive mind.

No individuality, no bigotry. Very simple.

Alternately, kill everyone except for one person, and then create a new species from cloned tissue from that one source.

Or, my personal favourite: create an artificial species of creatures that are basically easily mistakable for alien invaders, and make them take control. Gets rid of the humans and gives the planet to something more responsible, protecting other life from existential threats such as massive dinosaur-killer grade meteors. Some work, but it could be done.