Mexicans don't Drink Tequila??

If they do, you are apparently not supposed to mention it:

"During oral arguments Tuesday in an immigrants' rights case, Supreme Court Justice Antonin Scalia made a reference to one of the parties, a Mexican man who has been deported back to his country, as someone unlikely to keep from drinking tequila on the chance he could return to the United States.

The comment raised eyebrows in the audience and offended some who were told about the remark afterward on the grounds that it perpetuates stereotypes about Mexicans

Source

I wonder would Scalia be offended if told that his ancestors drank Chianti? I suspect not. I certainly would not be offended to be told that Australians drink a lot of beer. They do.