What are the two problems you see?
1) Plainclothes officers breaking down the door. That’s just begging to be shot.
2) Claiming to be police officers while simultaneously breaking down the door. That’s not announcing themselves, that just creating confusion and acting like home invaders.
Anyone who thinks those two acts constitute “good police procedure” is an idiot. At best.
Act like criminals, look like criminals, get killed like criminals.