Any belief system when taken too far becomes a religion. Once you have gone that route all reason and evidence no longer matter... also one assumes everyone is just as brainwashed.
Some of the few remaining "conservative" people I know (because since 2016 they have NOT actually been conservative at all) do not understand why, when they attack Biden or any one on what they perceive as the "other side", that I do not leap to their defense and foam at the mouth with anger and excuses. They are genuinely at a loss for words.
They say "fuck Biden" I am like "Okay."