Yea ,I've noticed .I guess there more aztec than anything (if there is still such a thing as an aztec) The Aztecs were not the only group/tribe of indians in what is now Mexico. There were dozens of different tribes, the Aztecs were just the most powerful at the time the Spaniards arrived, and so they are the most well known. Another well known indian group from what is now Mexico were the Mayans, down in the Yucatan there are still thousands of people who are the direct descendants of the Mayans, if you want to get a glimpse at what the Mayan civilization was like in it's final stages just before the Spaniards arrived I recommend Mel Gibson's film, Apocalypto.