That's ice hockey NHL, not hurling, which would've been many times funnier and stranger, not that this isn't cruelly hilarious.
Basically the Chicago Blackhawks Twitter account had intended to hashtag a tweet #CHIvsLAK, but it came out as "#ChingueASuMadreEPN".
This was almost certainly an unintended failure to notice an automatic prompt which translates as "Go fuck your mother EPN", EPN being Enrique Peña Nieto, the current President of Mexico. The tweet was promptly deleted but not after it had been seen and screengrabbed by many, of course.
So when we say understandable, we of course mean it in the sense that the mistake is understandable.
— Chicago Blackhawks (@NHLBlackhawks) June 2, 2014