I don't, it's literally the OED definition.Why do you feel the need to add the caveat of "typically one that is a minority or marginalized"?
What about say a 20 year old white South African that's been a victim of 'constant abuse", moves to a country with a majority white population, would he be racist if he held prejudiced views against black people?
What doesn't? Would it help if i gave you the definition of "reason"?But that doesn't fit the definition you posted...
Because unless, like you're doing, you're being incredibly obtuse it fits the definition exactly, in fact i wouldn't even say it 'fits' because it's literally what the definition is. Maybe you should ask someone to buy you a dictionary this Christmas.