Why do Trump supporters still believe the Big Lie?

There was not one ounce of real evidence presented to 80 courts around the states to support any of Trump's lies about voter fraud in 2020. It would seem Trump supporters would be angry for being lied to and tricked by Trump for trying to steal the election illegally. I am puzzled.
Why do Trump supporters still believe the Big Lie?
Why do Trump supporters still believe the Big Lie?
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