Upset is an understatement. He was irrational and verbally abusive.

very belligerent, uncooperative and verbally abusive toward medical staff.

There's all kinds of ugly in this world~ For some, all they need to do is keep their mouth shut & no one will notice theirs.

I was upset. I didn't say anything but I really missed it.

I was so upset. I was so furious.

Invalidating someone else is not merely disagreeing with something that the other person said. It is a process in which individuals communicate to another that the opinions and emotions of the target are invalid, irrational, selfish, uncaring, stupid, most likely insane, and wrong, wrong, wrong. Invalidators let it be known directly or indirectly that their targets views and feelings do not count for anything to anybody at any time or in any way.