Nah they would mostly be angry and resentful that the US now has coloured citizens, would probably be too enraged at the 13th amendment to even look at the 1st or 2nd. In fact I give 70% odds that they denounce the modern US as "just as bad as British rule."

People don't seem to realize that all of the founding fathers were slave owners and very enthusiastically supported slavery and the denial of human rights to all but the whitest of the whites. Part of the reason for the independence war was the worry that Britan would outlaw slavery.