It's like racially biased gun laws. The origin of gun control is southern Democrats trying to keep guns out of emancipated blacks after Republican Lincoln ended slavery

That needs context: Those southern democrats were recruited into the Republican party with the inception of Nixon's "southern strategy." That started in the early 1970's. They are now the backbone of the MAGA movement.

The entire Southern Strategy narrative just seems like an oversimplification. Suggesting that at one point the values of the republican and democratic party flipped. But that doesn't make any sense. Like you would have low information voters who had no idea the Republicans went from being pro war to anti war. Or that Democrats went from pro guns to anti guns. Instead it seems like the Democrats have been around since Martin Van Buren and Andrew Jackson, and that Republicans have existed since Abraham Lincoln. Although Lincoln's Republicans took up the second party slot to the Democrats, the republican party didn't take over the politics and ideology of the Whigs who they replaced.