*The OP's point is that racism is a form of systemic discrimination (like sexism and the other types) that affects members of the social minority.
I.e. anyone who isn't white, and in combination with colorism, the darker your skin tone, the worse it can be. Which is one reason (though not the only one) black people are at particular risk.
If you are a member of the social majority (i.e. white), which is not the same thing as the numerical majority (there are more people of colour than white people in the world, but they still don't hold the social power, as a group), then you may experience racial bigotry from individuals of other races, but you are not a victim of racism. Because it is still your racial group who has always held the social power in the world, and oppressed others via that lens.
To draw parallels with sexism, a man calling a woman a cunt, is worse than a woman calling a man a dick. They are both sex-based insults potentially based in that person's bigotry, but only one is systemically sexist, because men hold the social power.*
Rosie puts it more elegantly than my blunt OP 
Thank you Rosie