I think you are missing the point. Groups of people trend directions for a perceived shared reason. No that doesn't mean something stupid like every single Trump voter is a racist or that every single Cuban voter thinks Biden is a socialist. What it does mean is that you can play politics to that group for inroads with the group. This is exactly what you keep trying to tell me didn't work with one group, but it is totally a reason why some people left the Democratic Party. Not sure why that reflection only works one way in your eyes. It is a fair question to ask people who support a leader who openly supports racism and has been sued for his own racist policies by the same federal government he now leads, just like it is a fair question to ask why Democratic policies haven't brought back the rust belt. If that hurts some people's feelings too much, maybe they need to self-reflect instead of feeling sorry for themselves.