He did renounce MEChA last week:
http://bruinalumni.com
You'll note that it was slightly half-hearted. And, it was also last week.
That's about three decades after he was in the group. And, it's also weeks or months *before* he received endorsements from worthies like Magic Johnson.
That means they supported him probably knowing he was in that group, that they supported him *before* he had renounced that group, and AV's renouncement also means that he agrees that group is not something one should be proud of.
AV is now a national figure. Hopefully the MSM will now feel free to look into his background and that of people like Cedillo, Nunez and the rest.
Let me phrase that correctly:
Magic and others endorsed him weeks before he renounced MEChA.
I read just about every page on that Bruin link, but I didn't see where he renounced the Aztlan goals of Mecha. Did you post the wrong link, or did I not see the right page on the link you provided?