Then by your definitions, the current federal hiring practices are discriminatory.
First, those are not my definitions. Those are the definitions in law, as per executive orders 10925 and 11246 (the orders establishing affirmative action). It is a clever rhetorical trick to imply that the person to whom you are responding is using some wacky definition out of left-field, but it is kind of dishonest.
Second, I did not claim that federal hiring practices were non-discriminatory. What I claimed is that affirmative action is non-discriminatory, as it specifically claims to be about ending discrimination, in large part through the collection of data about hiring practices.
Finally, can you prove (or even provide solid evidence) of your claim that federal hiring practices are discriminatory? I don't claim to be an expert, and I would be willing to believe that such discrimination exists were you (or someone else) to provide evidence of such. That being said, your evidence would have to run counter both to my own experience and the stated policies of the federal government.
For my own experience, I did seasonal work for the BLM and Forest Service a decade ago, and the stated hiring policy was not to discriminate on the basis of race, religion, etc. In fact, USAJobs doesn't necessarily collect demographic information aside from status as a veteran and some information about disabilities. I can't speak from personal experience regarding the practices of contractors, but they are supposed to be held to the same standard.
Beyond my own anecdotes, the Department of Labor states that their policy is not to discriminate except to give veterans preference and to "... take affirmative steps to employ qualified individuals with disabilities." (, emphasis mine). Other relevant laws and regulations can be found on the Department of Labor's website, including the following which relate to equal opportunity employment:  and  (relating to executive order 11246, the current law-of-the-land regarding affirmative action), and  (relating to the preference given to veterans).