Henry Ford
Footballguy
And specifically because the 14th Amendment requires it.IIRC, the Amendments were only supposed to apply to the Federal government, not the States. Incorporation is a twentieth century practice of taking select Amendments and applying them to the states.
https://en.wikipedia.org/wiki/Incorporation_of_the_Bill_of_Rights
The 14th Amendment says the states can’t abridge the privileges and immunities of the citizens of the United States - which to the courts meant they can’t violate the Bill of Rights among other things.