Racism is a low opinion or expectation of someone based upon their race<period> The word reverse has no place in it, neither does asymmetry of impact. That asymmetry is important but does not change the fact that it is a conscious negative race based assumption about a whole race. Racism it’s own self.
The use of words intended to inflame do inflame, which puts an end to useful discussion or at the very least makes it very difficult. You wrote about the unconscious nature of it. There is nothing unconscious about the damning claim that all white people are racists.