So my theory is that if race doesn't exist then racism doesn't exist either.
What is your definition of race?
I define races as different groups of different people with different characteristics.
It's nice that you think you have the solution to end racism but I am pretty sure if there was no racism and everyone was one race there would still be racism as long at there are countries. If the entire planet had only one country and everyone is the same citizen then that's how we can get world peace.
Racism is bad and I hate it.
It's good that you dislike racism, and I think you're bringing up some very valid points here. I'm not sure how well it will work, but trying to end racism is a good yet lofty goal.