re: Cops are Heros and they protect us.

What's your point? Do you think those officers went to that house wanting to execute anyone? I doubt it. Was that a fatal error in information giving on a search warrant? Yea, and a sad error that needs answering to. Should the officers lose there job? Probably...but if I believed in good faith that I was doing a search warrant on the right house and when I entered the house someone fired a weapon at me that I wouldn't return fire? Yes I believe I would. It's the same idea behind stories of people who walk into thier home and see someone lurking in the shadows and shoot them, only to find out that it was a suprise birthday party guest. Is it tragic? Yes. Does it need correction? Absolutely! But it is not an execution! Come on have some sense!
You also said you do know what it's like. May I ask where you served as a law enforcement officer at?