Christmas is a time that’s supposed to bring people together. But if you’re North Korea, it turns out it’s a time to threaten to blow things up.

This week, the South Korean defense ministry agreed to let a Christian group build a 30 ft. Christmas tree near the North/South border. It’s actually more of a triangular metal structure, but it’s frosty blue, covered in Christmas lights, and looks pretty festive.

The North Koreans, however, are having none of it. They’ve called the tree “an open challenge and an unpardonable provocation” in official news statements. Pyongyang considers religion a threat to their regime, and thus are supposedly treating the tree as an act of psychological warfare.  Some in the South Korean media now fear that the North will launch artillery at it.

This news comes in the same week that North Koreans have been suspected of hacking Sony Pictures and leaking several movies online as a reaction to the new Seth Rogen/James Franco comedy The Interview, in which they try to assassinate Kim Jong-un.

We’re presuming Knocked Up on Blu-ray won’t be a popular Christmas gift in Pyongyang this year then.