RE: Black Police Association thing

This one's pretty simple, really. Groups that have legitimate concerns about unequal pay, decreased chances of promotion or other workplace difficulties (even just the mere being a minority and being the one or two "different" people in the workplace falls under this) have a legitimate, non-prejudice-based reason to form a group to make sure they're looking out for their good. If you're a white heterosexual male with no disabilities, no mental health problems, etc, then it's gonna be tough to argue that you have a need for a group that looks out for the equality of your wages, being the "different" person in the workplace, etc. it's not a "you're not invited" club, it's just a "you don't need a club like this" club.

there may be some very rare instances where some white males have a legitimate gripe about being taken seriously in their predominantly black workforce and get shunned out of town when they even think of suggesting and all white organization to secure their equal opportunity rights, but i doubt that you personally are affected by any such situation and, again, since it's such a proportionately low and unlikely unjustice in the great scheme of things, worrying about that one outlier is just silly