Which men are you talking about? The ones at the table who tried to reason with him?
Those are exactly who I mean. Talking the man to death doesn't seem like a viable option to me. A man walks in with a gun and we're supposed to "trust" that talking to him will curb his intention? That he is "really" not there to harm anyone? Then why not let everyone go but one person?
Of course he went there to kill people. Why else conceal a weapon, write a V on the wall, and then pull the weapon out and point it at someone, later FIRING at someone.
Why not just kill himself at home then?
As for being an expert shooter, we only have his wife's comment about that. Doesn't make it true. And when he was shot, he turned and tried to shoot the guy sitting on the end. Doesn't sound like someone who was intent on not hurting someone to me.
Those men weren't "trained" to re-act in a hostage situation any more than trained in a more violent response. Yet they chose the former. Weak. Sorry. It just is.