They were kind of to blame for the fall of Tenochtitlan no? Cortez was welcomed as an "Ambassador" vs as a conqueror.
Cortez came to Tenochtitlan as an 'ambassador' at the head of an army of 200,000 angry neighbors of the Aztecs, who had realized pretty fast that even a few of these 'gun' things would be really useful for cracking the city's structural resistance to sieges.
They rather put in with Cortez then send their kids off to the annual Aztec Hunger Games [Flower Wars].