It wasn't just Cubans I've posted several articles showing that Trump did very well among Mexican Americans in Texas particularly in the border county's. Trump also did well with Central American immigrants. By all accounts Trump significantly increased his Black & Hispanic vote totals.
I don't doubt that a lot of white college educated people, especially women, voted against Trump and for Biden because they thought he would settle things down and not be as crass as Trump. Since Biden was hidden from the American public these people thought they were voting for the Senator or even Obama's VP from a few years ago. Little did they realize what Biden actually was.
And it hurt Trump badly among these people when he beat up on Biden in the first debate. Trump was mean & rude and kept interrupting poor old uncle Joe. This had an impact on the squishy middle folks who desperately wanted to restore good manners to the White House.
Well now these same people are going to have a bad case of buyers remorse. They'll soon realize if they haven't already that there's a difference between a rude competent and a polite incompetent. And that difference is going to negatively impact every part of their comfy upper middle class life.
Most of these people are to young to remember the Carter Presidency. But history has a bad habit of repeating itself. And these clowns will soon be wishing for a POTUS that sometimes yells "YOUR FIRED".