Gee, advocating violence against people you disagree with? Losers, or both sides, shot in the head? That's pretty barbaric. Good thing we've got laws, and lawyers, to defend against such things.
As has already been stated, this is just the nature of the way trademarks work. If you've got a game with a trademark, even if it's generic sounding on its face, you're going to have to protect it, or you lose the ability to protect it later. Just take a moment to examine other trademarks, many of which are single words right out of the dictionary, and you'll start to understand. While this perhaps could have been handled more tactfully, it's not the least bit unusual.
As has already been stated, this is just the nature of the way trademarks work. If you've got a game with a trademark, even if it's generic sounding on its face, you're going to have to protect it, or you lose the ability to protect it later. Just take a moment to examine other trademarks, many of which are single words right out of the dictionary, and you'll start to understand. While this perhaps could have been handled more tactfully, it's not the least bit unusual.