Well, revenge is a concept reserved only to God (According to the doctrine)
Same thing can be applied to violence. We may not be able to kill others, but God(Or Jehovah mind you) can. Because... Well, because he's god I guess.
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That's actually one of my biggest issues with morality. We are supposed to be appreciative for "God" creating us and the universe, and that we have to just want to serve him because of that. I'm sorry, but I can't operate that way. It's an artificial way of removing free will. Tricking yourself into believing it's okay. Because God said so. Why is Jelousy, Homosexuality, Blood Transfusions etc. Wrong? Because God said it is, and he made everything, so you have to listen, or should want to listen.
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That's not a good enough answer for me, and one of the zillion reasons I left in the first place. As someone cool once said, "Such a god does not deserve my worship."