1. satanism is a religion, so antireligious people are most likely going to dislike them

2. anyone who is Christian is going to be pissed at them for worshipping the dark side. So will other religiou sorts

3. Its just sophomoric nonsense: "oh look they're sing amazing grace, lets chant hail satan!"

4. even MOR people will be pissed by this stand, ergo, they are not pulling many, if any people to their side by this stupidity.