Tell me, how would getting this guy's ID have helped the policemen in any way? Clearly they did not know what or who they were looking for. In my neck of the woods it would have been far easier for the policeman to say: "Hello sir, we have reports of a domestic disturbance in this area. I'm [Rank/Name] and you are?"
Odds are the guy would have answered, and answered honestly out of habit.
Then a simple, "Mind if we ask you a few questions?" and "Mind if we talk to your daughter a moment? We'd like to get this whole thing straitened out." Would have ended the need for tackling a girl and cuffing an old guy.
-- Not only that, they could have gotten on the radio and verified that the owner of the pickup did indeed go by that name. {If he gave them a false name, they would have cause to check id.}
Domestic disturbance calls can't be much fun, but adding to the stress of the situation by making needless, and literally unwarranted demands can't make them better. In no way could the actions taken by the officer save lives in any situation, that argument is unacceptable.