From what I've read, they said the Twatter account wasn't hacked. It was their actual website, and it's set up to auto post on social media.

I feel like the hacker had a huge missed opportunity to spread some real news. Instead they just threatened to kill people and cursed a bunch. Actually sounds more like some deranged left wing nut so that they can say "look what some right wing crazy did! This is why they should be in jail!".