As well killing of an entire planets population as your bomb. That is Terrorism.
Well then every faction in Sins is a terrorist.
Also keep in mind that the Advent aren't... really a religion, their use of terms like defilers and heathens has more to do with them seeing themselves as pure and enlightened, a greater form of life. They have no god that they worship, they do not kill in any one being's name, they kill for themselves and eachother, their collective mind, their Unity.
There is a finer line between religion and philosophy than most people seem to think. In the west there is a strong secular gap but it some forms of paganism, Buddhism and other far eastern religions I'm not as familiar with there isn't a very big difference, and some of these were technically atheistic.
my understanding of the tech is that its not tied to immediate deaths. ie, i just lost a frigate, i will now roll to see if it returns to life... its more like returning armada or truce amongst rogues in that every so often, you get ships. trouble is, where to bring them? however, i dont see any reason why the tech cant be made to work the way alot of people seem to think it does, via the on death-chance-to-resurrect method. can anyone think of a reason why you might not want to do it that way?
They could do it that way, but the tech seems to say they will reappear at your home world. Which doesn't seem to happen any more than you temporarily get clones of enemy ships you destroy. So neither of these things appears to be working currently.