This looks like dementia to me, however, his ability to focus that long on a speech wouldn't be possible. Was Reagan capable of giving speeches like that with his Alzheimer's?
Notice, how there is no concern for others, just rock out to the choir like it's normal, it's not! He delivered his speech with plenty of smiles. Weird, maybe it's not dementia, maybe it's cognitive dissonance and he's a psychopath.
I have had the misfortune of meeting a couple of psychopaths, one takeaway with psychopaths is inexplicable behavior. They do the oddest things. Most psychopaths aren't mass murderers, but George W. Bush is. Even though it looks like Michelle Obama was uncomfortable he kept at it, like she and his wife wanted to be arm swinging fools along with him. Shows a serious disregard for those around him. It's nothing personal, he just doesn't have the same behavior as normal people, especially in situations like this. Psychopaths are usually the life of the party, or in this case, the life of the funeral. They get bored easy, and I am sure W had enough and was ready to let loose with his dance moves. I mean everyone feels like doing some arm pumps at a funeral right?
The reason psychopaths are so scary is that they can seem normal, it's just that they can't control their impulses, like, say, dancing at a funeral. Most psychopaths don't want to murder you, they don't care about you at all. Kind of like serial rapists in the entertainment industry.
In times of war you need people who are incapable of feeling another person's pain. I guess that's why George went and declared war on a country that didn't do anything to deserve it, killing hundreds of thousands of people.
He's got no problem showing up at events because he never feels any remorse for what he's done. That people invite him anywhere, is weird to me. I bet after this strange performance they will think twice, before they want "W" at their funeral, is this why he's not invited to GOP events? He isn't going to be going to the Republican National Convention, probably because another psychopath will be there.