No, it's not... unless you are saying that whites are inferior based on their race. Motivation does matter. Also, the definition itself specifically says that racism "typically involves a race that is a minority or has been marginalized". That wouldn't include whites, would it?
Racism: prejudiced, discrimination, or antagonism directed against a person or people on the basis of their membership of a particular racial or ethnic group, typically one that is a minority or has been marginalized.
Motivation does matter. Are you trying to be inclusive (especially of those historically excluded) or exclusive?