if they kicked in my door, i'd be yes sir and no sir, i don't want to impede your investigation but i would like to remina silent until my lawyer, also may i record this? all as polite as i could(assuming conversation would begin AFTER they picked me and my family off the floor in handcuffs) i would NOT resist a commando team kicking in my door, doubt i could if i wanted too, sounds like a good way to get dead. if their a "fake" swat commando team, chances are your going to "lose" anyway, and you won't have a chance to "verify" them. but really, how often does a trained group of commandos, that are criminals, attack a pedestrian family? not saying it couldn't happen, just not very high on the list of possibles i'm worried about.
if they knocked nicely, i'd instruct my wife to contact dispatch and verify them, i'd step outside with them and close my door. i'd ask to see a badge. why do you want to come in? do you have a warrant? may i record this? all as politely as i could.