Yeah, this wouldn't really be news if the President of the United States of America didn't personally, repeatedly, publicly call out and attack SNL. Pretty much anything the President says or does is considered news. If Obama went out and said, "Fuck Arby's, I hope they go bankrupt", that would be news. The reason why it seems arbitrary is because no previous President has been asinine and immature enough to get into public spats with people that say mean things about them.