Maybe you should take a look at the actual Miriam Webster definition of racism.
Definition of racism
2a: a doctrine or political program based on the assumption of racism and designed to execute its principles
b: a political or social system founded on racism
3: racial prejudice
You and Marley keep trying to foist on the rest of us a definition that is not accepted by most English-speaking people.
What the rest of us hear when Marley accuses all Whites of being racists is that Marley is bigoted person who judges people by their race. Under the Merriam Webster definitions #1 and #3, that makes Marley a racist. Marley only mentions Black and White, and is blind to the existence of Asian people that don’t fit in either if those groupings.
It’s been over 50 years since the US took down the legal system of racial segregation. The country formally has equality under law. It has made great strides in moving toward making that goal a reality. It has had Affirmative Action programs that have given Blacks preferential treatment. It has elected and reelected a Black President. While it has a few people like Marley and KKK members who have overt racist ideas, it has been quite some time since it could be viewed as a racist country under definition #2.
Perhaps you could summarize the Marley definition of racism and contrast it with the dictionary definition.