God would have foreseen these people's sin, and not granted them any babies.
If he had done that why not go all the way and not have granted the parents of the sinners the birth of the babies destined to grow up to be such sinners? This argument only pushes the problem back it's not an excuse.
But Mike, really, the defense is the truth, that is you don't have to defend God as these things never hanppened in the first place, or if they did it was people doing something but excusing themselves on the grounds that God told them to do it and that made it alright.
Ethnic cleansing has appealed to people for a long time. At the time that story was written the moral development or thinking of humanity didn't see anything wrong with it so they didn't see anything wrong with God doing it. Today we have progressed, not God, but humans and many but not all feel ethnic cleaning is wrong and so when it occurs as it so tragically has in recent times voices and even organisations including churches decry it.
The thing is that in attempting to defend the notion that the Bible is inerrant and God is 100% omniscient, good, and powerful you are arguing as an apologist for ethnic cleansing an evil. When you get results of 1=0, or good=evil you should strongly suspect that there is a contradiction inherent in your premise, or your logic.
lfen