There is only one human race, that's right. White, brown, pink, yellow, red, olive, black are just skin-tones.
Diversity is the only way to go, and differences add a bit of interest.
We have the same value, the same rights, the same responsibilities, but we are all individuals.
Mixing will cause new diversities, and we can learn new things from other cultures. Pizza, doner kebab, spring rolls and sushi can now be found all over the world, not just in Italy, Turkey, China or Japan.
You've never left your own country, have you, dolt? There are people of different ethnicities and skin-colors in ALL countries, and there are racists in ALL countries. European right-wing extremists are working together with Hindu fundies to oppress the Muslims in India (and in Europe). Neither the US, Canada, South Africa, Australia nor New Zeeland are "white countries". The European invaders have been there less than 600 years.
See, nothing on your list are as contradictory as you imagine they are.