Never, in my entire existence as a Mexico supporter, have I thought it would be necessary to tell a U.S. fan the following: Relax, amigo—you don’t have to cheer for El Tri.



It’s laughable even to type this. And yet, as Mexico begins its World Cup campaign, it has become clear that someone needs to say it. Everywhere you look on the Internet right now, someone is telling Americans to support Mexico, their team’s biggest rival.



Yahoo Sports released a video last week titled “Why USA fans should root for Mexico in the World Cup.”



Alexi Lalas has voiced his support.



ESPN The Magazine published a piece titled “Why Americans should root for Mexico this World Cup.”



Sports Illustrated did this:



Even the Men in Blazers, whose entire schtick is built around a carefully cultivated identity of being semi-ironic USA superfans, held a live event in support of El Tri.



If you’re...