Another way we have is by not getting involved in wars in the first place. The only government official who is authorized to order killing is the one who created us. His option. Rev 4:11. IF we all remembered that, there would be no more killing. My personal opinion is, that would be a good thing. I'm always surprised and saddened by those - especially the ones claiming to be Christians [John 13:34,35] - who disagree. What do you think, Bob? Good thing or bad thing?
Did I mention it's a very nice story?

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