This is called selective information processing and confirmation bias.
People will only listen to information that confirms an existing belief.
What else is new?
I've found that if I try to point out some gun thing to someone who doesn't like guns - they say - I don't like guns.
The emotional route blocks info that would rationally challenge a belief system from being processed. It occurs in every domain.
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NRA, TSRA, IDPA, NTI, Polite Soc. - Aux Armes, Citoyens
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