So what would stand in the way of Satan worshipers holding a black mass at a base chapel? Or people holding Festivus events?
Nothing. They already have regularly scheduled Wiccan services at the Air Force Academy Chapel.
I've met with and dealt with and fought these people before, and I would advise folk not to be sidetracked by these antics, important though they may be in their own right. Ultra-progressives and marxists care only about destroying capitalism, free-markets, and traditional liberal (classic sense) democratic societies. They don't give a toss about gay marriage, social justice, womyn's rights, nuclear disarmament, green politics, or any other of the current crop of "trendy" leftist causes. To them, all such issues are mere tools to achieve their ultimate objective, and we should never forget it.