Not sure why he became so unhinged. He disliked Donald Trump especially as he was bad mouthing Trump the past three years.
He's always been unhinged. Just because you liked him when he was flipping out and mongering wars when it was cool for the GOP doesn't mean he was ever lucid.
I hate to sound like this, but there are foundations and foreign interests paying big $$$ to keep "experts" like this psycho driving us into perpetual war.