What was with the crowd booing Maidana?

Ortiz and Maidana put on a great show, and when Maidana wins in a barn burner, the crowd boos him? I though Mexicans were all about machismo and giving some to land some? That is exactly what the Argentine did and made their man quit. That was deserving of round of applause from the crowd, not shameless nationalism responding in boos. Props to Maidana for getting up off the canvas numerous times and continuing to bring the heat to the young contender.