In the Southern Hemisphere, low blows are reversed. Do NOT touch their bellybuttons.
Let's put ourselves in the Argentinians' shoes: You come from a snobby little country that both tries to pretend they live on a different continent (hint: its the continent with Spain, which is a different country) and thinks it's the most important nation on its continent (hint: that would be Brazil, a different country), and then you get to the Olympics and the northern neighbor who has dominated your region for all of modern history (hint: that would be America) absolutely dominates you in basketball. Then you remember that Argentina is actually pretty good at basketball, which is why they get to send a few lucky citizens every year to work as basketball players in America and they never come back except for the Olympics, because why would they? So you hit Carmelo Anthony in the nuts. Makes sense to us. Don't cry for yourself, Argentina. We won't.