CNN Fake News King Chris Cuomo doesn't like being called Fredo. It's comparing him to the dumb brother in The Godfather. Fredo is apparently also a racial slur. Calling an Italian-American Fredo is just like calling a black guy the n-word cause something something racism.
President Trump didn't get that particular memo. He retweeted yesterday's video of Fredo Cuomo freaking out after being called Fredo, and trolled the hell out of Fredo to boot.