Confidence is not "I know what I'm doing."

Confidence is "I know how to find that out" and "I know how to learn new things" and most importantly "I know when I don't know what I'm doing, so I stop and find someone who does"

Obnoxious blowhards rely on people not understanding this distinction. And they amplify it by framing actual confidence as weakness.

This may be a useful thing to talk about with certain people in your life who are being fooled by fascists.