https://www.prageru.com/courses/history/why-did-democratic-south-become-republican

https://www.prageru.com/courses/political-science/black-millennial-female-and%E2%80%A6-conservative

https://www.prageru.com/courses/history/inconvenient-truth-about-democratic-party

https://www.prageru.com/courses/political-science/what-fake-news

Which "real history" did you learn?  If it is similar to some of the above, then what are you complaining about?  Don't get mad at me.  Attitude is a choice.  If you're mad that the truth is counter to your narrative of events, then write a textbook.

It's ok.  You don't need to be ashamed that you've been so, so wrong all these years.  The road of life allows U-turns.