When someone genuinely thinks another race is inferior.
It's true that this word is unfairly used on a lot of white people.
HOWEVER, it is entirely wrong to say that black people are generally just as racist as white people.
Black people CAN NEVER BE AS RACIST. Unless they brutally enslave, torture and murder millions of white people. And that is never going to happen.
White people have a gruesome history of hundreds of years of murdering people. Black people .... Do not.
Therefore, many people are entirely justified in calling white people racist. Individually, definitely not. But as an entire race...well there are some pretty bad things to come to terms with.
P1: All white people are racist.
P2: You are a fool.
PA: Black people are just as racist as white people.
PB: I don't recall black people starting a slave trade...do you?