Saying Biden will cancel Christmas is the most ludicrously desperate thing I've seen from his campaign yet. He's also trying to scare people into voting for him because Biden will listen to the scientists about Covid. All he seems to have left is stuff that will rile up his own base; he's run out of ways to attack Biden in a way that will resonate with the wider electorate.
And this stuff (Biden, a devout Catholic, canceling Christmas? Really??) will only make him look more unhinged to that wider electorate, when he's been working so hard to make it look like Biden's the one losing his mind.