Looking back at some of the opinions (possibly including Callie Girl, Forty Two and Mischief) from a couple of pages or so ago, I mostly agree with all of you, but I think you are slightly overstating the extent to which Trump voters might be racist/sexist etc, or the amount of Trump voters that might be racist/sexist.
Some people that voted for him did that in spite of views where he stated some borderline sexist/racist comments, not because of them. They voted for him because they want a job in the US, or because they don't like Washington, or because they don't like the Clintons, or they see a successful businessman. They perhaps didn't like his comments about women, and counted that against him, but in the end saw that as less important. I got this strong sense of that from a number of interviews I watched on TV and online with Trump voters.
Some of them agree with you about sexism and racism, but don't think his comments were bad enough to disqualify him as a viable candidate, just a negative point. They may agree with you but just not strongly enough. A lot of Trump voters don't seem to like him at all, but in their minds there are some negative points against Trump and others against Hillary Clinton and it isn't clear who's worst.
Some people probably didn't even hear half the things that he said. It would be nice to think that everyone reads politfact extensively before voting, but that's just not the reality. People see a few soundbites on TV and a few articles on facebook and perhaps mix it a bit of Fox News or Breitbart and vote accordingly. That is the (sad) reality.