I think it has to compromise with your fellow bandmates, like for example, you just don't ask a muslim or a non-christian to perform at some church just because one of them belong to that religion and got invited.
I believe music in
church is part of worship it is not a concert or performence, so I don't think a church will invited without a notice that the band is not a worship band.
Some of christian metal band member can tolerate to do "dark" theme, like Nicko McBrain do Iron Maiden newest song "Lord of Light"
http://www.metrolyrics.com/lord-of-light-lyrics-iron-maiden.html
, or still happily drumming "Number of the Beast" .
so why worry about atheist, anti christ, christian, muslim , new age, tantric, straight, non straight, theme in music ?
Let's keep the thread healthy huh..peace
Peace !!
ah,,, Can I add also .
Can I say a christian who listening metal is get more challenge that vice versa? in my younger day (..ok, I still young) I get difficulty explain my church mate (and some of girl friends ) when they saw my room full of Cemetery-theme poster .
or GnR's APpetite for Destruction:
I get hard time explaining that it was the music I interested in. Just like I read The Golden Compass or Da Vinci's Code, didn't mean I anti the church.