No, no, no. Muse is my favorite band, I know a lot about them. Matt Bellamy, the lead singer, is an atheist. quote from him: “Being an atheist means you have to realise that when you die, that really is it. You’ve got to make the most of what you’ve got here and spread as much influence as you can. I believe that you only live through the influence that you spread, whether that means having a kid or making music.” Muse is definitely not Christian. Listen to their song lyrics again. Some songs are political in nature, and they are very interested in conspiracy theories, supernatural, dystopian futures, etc. (Assassin, Apocalypse Please, Hysteria, Exo-Politics, Invincible, etc.) Look at their music videos, especially Invincible. They are alternative/progressive rock.