And the KKK and al Qaeda are unacceptable institutions and there's no problem with generalzing there. Every single member there is a problem simply by being a member. If people uphold an atrocious institution then there's no problem saying they're doing something atrocious.
Do you honestly think all police are like Al Qaeda? Have you ever known anyone in law enforcement on a personal level? I find similar reactions from people who have never known a gay person before.
