Texas Pledge: paraphrased, I pledge allegiance to thee, one state under god and indivisible. That is pretty much it. Note the historical inaccuracy: we are divisible by virtue of the annexation treaty. So we are pledging to a state which is allegedly under god and can't be split up.
AS for blacks voting, you are technically correct, sort of the way the Soviet constitution guaranteed all those rights to the folks who lived over there. For all practical purposes, most blacks here were denied the franchise. White primaries, intimidation, etc. And there were the lynchings on occasion, meant to keep the folks apprised of where they actually stood.
I'm 64 and grew up during the JIm Crow times and it often seems to me that people who came of age after the 1960s really have no idea what an oppressive place this was for many before Lyndon Johnson, the dark one in the eyes of modern conservatives, lowered the hammer on the south.
I love the place but it has a lot of warts and I am not inclined to demand that people wrap themselves in flags and run around bragging about how their country is number one. There are a lot of great places to live in the world, a lot of places which have freedom, where you can make a living and live peacefully without worrying about criminals tearing up your neighborhood. This is one of them. There are others.
AS for the fellow waving the Mexican flag, he was expressing his love for two countries. I could point out a lot of problems in Mexico, but it isn't my country.
Re the comanches: comparing a pre industrial, stone age society with the epitome of western civilization (in its own eyes anyway) is kind of unfair, no?
As for the spaniards, they really screwed up Mexico: abolishing human sacrifice and cannibalism was totally at odds with traditional religious practices among the zen envirommentalists who occupied the empire when they got here. Which is perhaps why all the other natives helped the spaniards?