Nah. There are a lot of bad Christian rock/metal bands, but there are quite a few good ones too.
To name some I still come back to, even though I no longer identify as a Christian:
- Skillet is an obvious one (not my thing anymore, especially everything after Awake, but can't call them bad)
- Silent Planet
- August Burns Red
- Underoath (well, they used to be)
- Fit For A King
- Wolves At The Gate (though their lyrics can be too much on the nose)
- Flyleaf (when Lacey Sturm was still on board)
- Love & Death
- Children 18:3