I have two friends who work for the Austin Police Department; both are black, both are male, both are less than 40 years of age, and both are sworn officers. Your broad brush is neither warranted nor appreciated.
There is actually not much correlation between the race/age of the police officer and the amount of profiling they do. Your anecdotal experience doesn't do much to refute grandparent's accusation (admittedly a non-argument). That being said, I've never experienced racism in Austin, while the poverty (standard level for Texas) is quite distributed between all colors and ages.
Minority cops are likely to be even tougher on other minorities. This is because a.) they don't want to look like they're going easy on minorities and b.) they think whites are more likely to file a complaint.
When analyzing an institution, we look at the results. After all, despite what some would like to pretend, having a black president does not eliminate racist policies.
Same goes for your policeman buddies. It adds nothing to the conversation that there exist at least two black policemen in Austin; we knew that. (Certainly, wavefunction's comment is far more "appreciated" and helpful than your fallacious putdown.)
It's the same reason that all other employees of any other employer shouldn't be tainted by the actions of their peers, even ones entrusted with the use of firearms. Punish the offender, not the group.
Well, we don't hear much about cops shooting other cops so I think your friends will be ok.
How do your friends explain the deaths of various young black men shot by the police who were unarmed and had not committed crimes or violent crimes? One is too many.