Ultimate Fighting Championship (UFC) 185-pound titleholder Chris Weidman expects you to cheer for him if you live in America, because he's from America too, and everyone should be rooting for their own, in the same way Ireland "shuts down" when Conor McGregor is in town.
The undefeated middleweight talks to MMA Fighting:
"For [McGregor] to have so many more fans than Poirier, over here in America, I mean, Americans are cheering for him and then you have all these Irish guys coming over cheering for him too. So America is the one country that, they don't cheer for their own. They won't just stick with Americans. I feel like Americans need to get better with that... I didn't have the full support of America. Not everyone American was rooting for me because I'm from America. If they were rooting for me, it's because they were a fan of me. There was a lot of fans from America who were cheering for Anderson Silva and Lyoto Machida."
In defense of Brazil, both Silva and Machida -- recently defeated by the collegiate wrestling standout -- are widely-recognized as two of the finest strikers in all of mixed martial arts (MMA), and were putting dudes on their asses long before Weidman strapped on his first pair of gloves.
But they've since been deposed and you are left with an "All American" champion.