Why do conservatives create and promote obvious lies and myths?

This happens lot on GaG where conservatives have insisted repeatedly that:

1. Biden has dementia - Even though he has never been diagnosed with dementia and has no signs or symptoms of it conservatives have repeated this myth many times on here. It is a lie.

2. There is a "southern border crisis". The conservatives that repeat this lie are people that have never been to the border to see the situation but continue to insist that "illegal immigrants are streaming across the border" even though this is False. I personally live very near the border and cross it several times a month, and it is NOT open, and there is no "crisis". This is an outright lie.

I cannot understand why conservatives repeat these and other lies since by doing sp they severely damage their own credibility in regard to everything else they say.

Why do conservatives create and promote obvious lies and myths?
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