I don't mind Christian Metal. Killswitch Engage, All That Remains, and Times of Grace all have very Christian-influenced lyrics and are fantastic bands (well, except for All That Remains latest album which is decidedly softer than the rest).
But then, I'm a rare breed, I'm a proud Christian, and a proud metal-head. And I seem to get crap for it on both sides of the fence. Christians try to tell me it's satanic, while at the same time many metal-heads really have a hatred for religion in general.
I do steer clear of overtly anti-God or anti-Christian bands like Cradle of Filth or God Dethroned, though. Because I just don't feel right listening to lyrics like "Another Christ hunt, a broken crucifix, with blood of Christ I quench my thirst." Makes me feel a little guilty as Christian.