> What is the point in changing the messaging when racism and sexism are at the root of the problem?

Because it is in fact the messaging which is the problem, not racism or sexism. Why on God's green earth would you expect people to vote for a political class that openly hates them, as indeed posters here are kindly demonstrating? I can tell you from personal experience that there are a great many Trump voters who aren't racist or sexist in any way. They are friendly and helpful to all whom they encounter in life. But they believed (rightly or wrongly) that Trump would best represent their interests, so they voted for him. Excoriating them as Bad People (TM) is only going to convince them that they were right to vote for Trump, because they can observe that Trump's opposition hates them.

If your goal is to reduce support for Trump (or at this point his successor, since he can't be president again), then your #1 priority should be to work on messaging. It is the messaging of the Democrats that pushed so many people into Trump's arms, and unless that is changed it will do so again. Painting with the broad brush of "they're just racist" is not only intellectually lazy and untrue, it is actively harmful to the Trump opposition's cause.

> What is the point in changing the messaging when racism and sexism are at the root of the problem?

If your position is that racism and sexism are the root of the problem — which I am not contesting — how wise do you think it was for the Democrats to try running with a black woman?

> Voting for a traitorous convicted felon

The Epstein revelations show that pretty much everyone that could make it to the ballot list has skeletons in their closet. The only difference is that some of them manage to hide it better than others.