In Our Lord's time there was a strict devision between the wealthy and the poor, with Jesus saying it was more difficult for a camel to pass through the eye of a needle than for a rich man to enter heaven.
It's a funny thing, but in ages when even religious people had a respect for the well-to-do that they did away with Our Lord's imagery by saying that one of the gates through Jerusalem's walls was so much narrower than the rest that it was nicknamed "the Needl'e's Eye."
Our Lord's condemnation of wealthy people flaunting their importance over the poor could also be applied to white-skinned people who were flaunting their importance over dark skinned people. As well, his condemnation could be invaded against people who make much of their noble birth.
Vatican II did not openly attack classes of people that saw themselves as superior, instead, it made much of every person created in God's image.