2. Trump knows nothing of diplomacy. He does know that DeSantis was his most effective political rival, and in Trump fashion, out came the childish (and less than merely inarticulate) schoolyard names. If Trump can't win on merit, he (metaphorically) poisons the well.
3. Trump, sadly, will not win the general election. He is, and continues to make political enemies out of folks who would have supported him. I know some. I wish it were different.
Biden is moving up in the polls. The RNC has barely raised any money. Save America spends 85% of their operating costs on Trump's legal bills. The Democrats just won a special election by 27 points in Alabama. The DNC is swimming in cash.
At best, Trump eakes out a victory only to walk into a Democrat-led house and senate where he's impeached before the moving trucks even arrive.