1) I'm liberal, and I don't hate the cops.

2) If a liberal were blaring their Very Important Opinion from their rooftop I would be highly annoyed, and embarrassed that they supposedly shared my opinions or represented me in any way.

3) Mr Marr is a white supremacist. I assume that you are not, and that you wouldn't want people to think he represented you or your political party.

So why do you seem to be defending him? You don't have to defend something just because it's anti-liberal. Would you be happy if he moved in next door? Would he be good for your peace of mind or your property value? You don't deserve to be treated like that, and neither did his neighbors.