My viewpoint is that my life belongs to me. Not to you. Not to the State. If I choose to give it up trying to rescue a loved one, then that's my business, not yours. I would go in, and not expect you to come in after me if I didn't make it.
And, yes, I would use deadly force against you if you attempted to stop me.
And then you wonder why the man got Tazed.
I know your son is dead already before you rush in. You can be damned sure that I’m not going to let you in so that you die for nothing trying to save someone who’s already dead.