Southern Democrats ... I still don’t get it

[True Federalist (진정한 연방 주의자)]

American political parties were at one time far less about ideology and more about identity. There's still a remnant of identity politics but it is not nearly as powerful as it once was.

[True Federalist (진정한 연방 주의자)]

Benjamin Franklin was from Boston, no slaves, he was a Quaker like Lincoln

Neither Franklin nor Lincoln was a Quaker. Because he ended up in Philadelphia, he did have to deal with Quakers, but religiously, he was a Deist with Unitarian leanings. While he never formally joined any church, Lincoln fairly regularly attended the First Presbyterian Church in Springfield until he left for Washington.