As for the topic itself, there's really nothing to be gained from getting caught up in semantics over the definition of "racism" or "minority." We all, I'm sure, understand that words have multiple, often overlapping, meanings and that linguistic sophistry only serves to distract from the important subject, which is the actual reality of the situation such as it pertains to people's lives.
To say that "you don't fight racism with racist acts" is problematic, in that it uses a lingual quirk to make something seem paradoxically foolish. The word "racism" is being used to describe related but entirely different concepts. The first 'racism' refers to the abstract institution of 'racial injustice," whereas the second use of 'racism' uses the word to mean solely 'based on race as the primary factor.'
Thus, unpacked, the argument reads "you can't fight racial injustice with acts based on race as the primary factor," which is absurd on its face. The only way to fight racial injustice is with action in which race is considered as the primary factor.
There have been African American's in the land that now makes up this country ~350 years now. For two thirds of that time, they were legally considered property. It's only been illegal to openly refuse to employ them, rent houses to them or let them eat at your restaurant for 1/10th of the time they've been in this country. It was less than 50 years ago that the last NFL franchise allowed itself to be integrated. It was as late as the 80's when the sports media openly discussed whether black athletes were too deficient mentally or in terms of character to make good quarterbacks.
And after all of that, to suggest that all of a sudden, if we all stop acknowledging race as an issue, it won't be, is, too my mind, criminally wishful thinking.
The Rooney rule isn't in place to ward against racist owners not wanting to hire black people. It's there because it takes a lot of effort to change the realities left over after three plus centuries of being considered, both in the nation's hearts and its laws, a lower class of person.