I think the ban on open carry in Texas dates to Reconstruction during the late 1860s and ‘70s, when there were many unreconstructed Rebs and outlaws, like John Wesley Hardin, riding the landscape. Back then you had to prove that you were a “traveler” to carry in Texas.
The law against open carry in California is fairly new, but you can still legally open carry a loaded weapon while occupying a campground.
Open carry of firearms is a civil right. Racist Dems have always hated it.
/johnny