Q-your reference to Isaiah 13:15-16 was describing what was going to happen. No orders were given. This was in reference to Babylon's capture by the Medes and what the Medes did as they sacked Babylon.
I agree that genocide committed in the name of religion is not justifiable without a command from God, but I have no way of knowing if such a command was given to these people. Stalin was an Atheist, and he is quoted as saying,"one death is a tragedy, ten million deaths is a statistic." I'm of the opinion that genocide is simply an option, just like suicide is an option. and yes, but I made you smile
gb-If you have to pee, you have to make some choices. One choice is to pee where the urge strikes or move to a toilet. Failure to make a choice means you pee where the urge strikes. When you were a child, that is what happened. Toilet training was learning to make a choice and then putting it into action. If you would like a biblical reference for why man deserves to burn in hell for eternity:Matthew 25:44-46
Then they also will answer Him, saying,'Lord, when did we see You hungry or thirsty or a stranger or naked or sick or in prison, and did not minister to You?" Then He will answer them saying,"Assuredly, I say to you, inasmuch as you did not do it to one of the least of these, you did not do it to Me." And these will go away into everlasting punishment, but the righteous into eternal life.
If you would like further references I'll be happy to give them.