0bama’s performance is a symptom of what you posted - liberals are not used to having to actually debate issues. They namecall and think they “won” some point.
Arguing with liberals is like playing chess with a pigeon.
No matter how well you play chess, the pigeon just knocks over the pieces, craps on the board, utters incoherent and vaguely obscene sounds, and struts around like he won.
Very funny!