I might not feel as bad for them, they certainly made their choice of career to be cops, but at the end of the day its the institutions under capitalsim that hurt us the most, the individuals are just tools of the system, if Billy-bob McOfficer quits being a cop, Randall DiCopper will be there to replace them and the system continues.
And even though they are cops, they are also human beings too, also caught up in an abusive and exploitative system.