Here's a theoretical situation that has theoretical solutions to racism and loveism.
Lets say we have the ability to replace the normal XY/XX chromosomes in our children with a new one (let's call it the Z chromosome). This causes whoever has it to have green skin and photosynthesize like plants, as well as being able to choose between male and female body parts (once they've reached a certain age, like 18 or whatever). Now, of course, these aren't going to be humans, most likely. You probably wouldn't think of them as being human. We now have this new species of intelligent beings (that are our children, still, though). There's no racism or loveism because they're all green and they have no set love.
So, this species has abilities we don't, and lets say they don't have any new health problems from any of this. That makes them genetically superior, right? Does this mean we're obligated to have ZZ children rather than normal children, since otherwise we'd basically be deciding our children would be inferior?
What about political superiority? Should these scientifically, provably better not-quite-humans be above us? Is there a reason they should be? A reason they shouldn't?
Discuss theoretical situation, please.