It does sound harsh, and it is. We (people on HN), tend to talk about both candidates as if it was some equal comparison.
However, this is adamantly not the case. Trump is not like any candidate America has voted for in living memmory. He is SO outside of bounds, that frankly we collectively fail to understand him, and have to substitute some "default republican" candidate in our minds to deal with it.
Even in your comment - "it was a critical mistake to turn up the rhetoric so hot", even you will agree that Trump is incredibly toxic and out there in his comments.
Yet, you will genuinely feel that Harris/dems turned up the rhetoric. Not just this, there are a million places where blame is placed at the feet of Dems, for things that Trump or the GOP has done.
Nothing the dems can do will make a difference, because the Republicans have the superior model. Republicans can focus entirely on psychology, without having to worry about being called out on it, because Trump is simply causing an overflow whenever anyone has to deal with him.
We all just end up "ignoring" whatever new incendiary thing he has done, and instead deal with the office/position of either "candidate" or "president", because those make sense.
The dire warnings are literally founded in documents that are going to be enacted, based on what people are actively building teams for and recruiting.
However, there is no measure of evidence, including action that has happened, that will move the needle. It simply wont, because its not what people care about.
Some group will go to Reddit, to console themselves, the other group will go to Fox and the Consvervative bubble to reassure themselves. They will be given the same info that sells, and then they will learn to ignore everything that causes cognitive dissonance.