The thing that Puritans, Quakers, and Catholics living in England in the 1600s all had in common is that they were in the religious minority, which is why many of them chose to form new lives in the New World.
They saw plessy v Ferguson as that the were "separate but equal" meaning that all races were given the same opportunities but were segregated.
Let me know if this is right/ helps!
The Ninth Amendment states that there are other rights that may exist from the ones that are specifically mentioned and even though they are not listed, it does not mean they can be violated.