When the police behave like soldiers they should not be surprised when criminals shoot back at them with fully automatic weapons. When you start a war, the enemy shoots back.

There was no imminent danger, the police were not greeted with threats of gunfire or any actual gunfire or material threat -- they are lucky that they didn't walk through the door finding a very angry father, heavily armed, with no little alternative but to use deadly force.

Assholes don't live long, or if they do: they get beaten regularly, literally or by life (metaphorically) ... This goes for the occupants of that drug house and the cops that raided it -- they are all shit in my book.