Since Christianity is all I'm really familiar with, that's all I'm going to talk about... feel free to discuss any religion you wish.
A whole lot of what is described in the bible sounds pretty darn evil to me.
The old testament describes all kinds of atrocities being performed by God, and even the new testament describes some pretty terrible things. Not to mention the whole "hell" thing.
So, Christians, if God found your also-Christian friends and family "lukewarm" in their faith (which, to god, according to the bible is the same as being an unbeliever), would you be fully in support of them being tortured for days, months, years, forever?
I'm sure that other religious describe similar horrors.
...If any of this is true, it sure sounds like evil to me. I'm hardly the nicest person in the world, but even I find this stuff appalling.
If you aren't fully in support of it, do you seek to challenge God? What kind of believer does that make you?