Great essay, Frank!
But still, what you tell me is unfortunate, because many people still try to use backronym-style revisionist definitions of "racism" (politically loaded definitions, I might add), which go something like this: Racism: A system where one group oppresses another or other groups of people based on inherent different traits.
And then they go on to "reverse racism," which they define as follows: Reverse Racism: A system where a formerly oppressed group or groups of people gain the power to oppress the former oppressor
Ex: Reverse racism does not exist in the United States.
Basically, these are tactics more than anything to absolve certain groups and communities from being capable of "racism." I tend to use dictionary definitions of racism, which can include any and all people as being capable of racism, whether they have power or not.