The brain washing is complete

[GoCubsGo]

5. The rallies and boat parades were also Trump's "proof."

Which is who they got this nonsense from. He's still spewing that bullshit whenever he gets a chance. Because, you know, Biden was "hiding in his basement," rather than deliberately keeping his rallies and their attendance to a minimum, due to the pandemic.

I actually saw more Biden/Harris yard signs in my deep red district than Trump signs.

I'd say your mother and brother are already in the cult. I feel your pain. My brother and his wife are in it, too. They also helped foist the imbecilic Lauren Boebert on us. I gave up working on long ago. It became glaringly obvious that it was an act of futility when even my mom couldn't talk any sense into him.