Nobody ‘decides’; it isn't subjective. If you're discriminating by giving an advantage to a minority when hiring in the interests of boosting the numbers of said minority, then that is positive discrimination. My comment wasn't meant to state any personal opinion of this practice, but to highlight it as being entirely different from choosing to have a work environment in which discrimination (e.g. sexism, as is assumed to be the case with ‘bro-culture’) is not tolerated.