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You can’t “alienate” angry shut ins that think about shooting the mail man every time he comes any more than they’re already alienated.
These people are not operating in reality. The disconnect is too great for them to realize how ridiculous they look to the rest of us. >

The problem is their base doesn't see any problem with how they act. Until they alienate their base, the have ZERO motivation to change...
Edit - additional thought: I see the alienation starting, but it is too slow and I worry about the damage the MAGA fascists are going to cause before The People stop tolerating their behavior.