If not on Mecha, and Aztlan web pages, show me where to find the truth that Hispanics are not directly tied to those organizations that want to overthrow the Southwest back to Mexico. Do we have to assume that those web pages, and the Hispanics that write on those sites and their intent don't exist? Are they all liars, and are we to assume those pages to be bogus or fictitious?
I'm sure some or all of the writers of those pages are hispanic; but you are failing to see the fallacy of the logic that the map you presented depicts something about Aztlan. It would be as illogical as presenting a map depicting "the rise of neo-nazis in the U.S." and doing so merely by presenting Anglo population statistics.
NOT EVERY HISPANIC THAT MAKES A COUNTY RED OR PINK IS A BELIEVER IN AZTLAN. In fact, I'm convinced that very few are.
However, I can see where those who like things in a simple, straightforward, black & white manner would like to believe it's so in order to not have to think too hard about all of it.