No, it’s not at all. It is totally correct, out of 10 Republicans I know well, 8 are now “Dump trumpers”. Does that mean that out of the general population, 80% of those who voted for trump are now dumpers? Not at all. My friends tend to be smarter than the average bear, arent racists or white supremacists, etc.
However, it is a good sign- and the Lincoln project and the many leading GOPers backing Biden also show the same trend- many thinking Republicans, those with brains and hearts are wanting to dump trump.