The human condition whereby the primal need for identity and trusted association, prove to be more important than objective, critical thinking; and the quest for goodness, righteousness, and truth. Often magnified by a parallel lust for control, capital, and power.
It’s tough to explain why politicians will put party before country; my only explanation is that it is an example of tribal ignorance.
The decline of education in America and the coinciding rise in more Americans afflicted with the Dunning-Krueger syndrome is strong evidence that many people live in a Fact-proof Ignorance Bubble, free of rational thought, logic and common sense.
Trying to discuss world events with Trump Supporters is useless since they live in a Fact-proof Ignorance Bubble.