So you've known your friend long enough and well enough to consider him a best friend, but because others in his profession do the wrong things you want nothing to do with him? I've never shot anyone's dog. In fact the last time I went into a home there was a large pitbull. I petted him. Why people can't see the distinction between cop and bad cop is beyond me. I guess making that distinction is mentally more difficult.
The problem is perception. Perception is that there are more and more bad cops. Bad cops get a lot more press and attention from the public than good cops. I have several friends that are cops and if it were not for them I would think from my last 3 contacts with local police that the force had become nothing but bad cops. I know better but the inclination is to judge all by the actions of a few when those negative actions by the few become more and more frequent.