I have heard people say, "I can't believe in a God that does this or that." That is completely illogical. God can be any way. Why would he have to be any particular way? Though I wouldn't frame it this way, why couldn't the real God be genocidal and destroy people for any reason including unbelief?
God allowed what was allowed under his authority and directive, whats interesting to note is that he had a plan also to resurrect all those whom were lost which tends to get lost. He allowed what he did allow in promise of the covenant for his Chosen people to have the land which was promised to Abraham, and made his descendants countless as the sand and stars. That old covenant was achieved through Jacob and his descendants. And they gained land by war, but people had to die.
God's promise though was for Israel then and there.
Now human beings make and choose what they do - like Hitler and his doings with his own people and war which was established. God doesn't have part in those things, but he allows freedom of choice.
The israelites didn't have to do as God commanded and sometimes they didn't and they themselves also paid a price, but God had a plan in his mind, to be able to resurrect them.
@the.reverent.atheist - Just wanted to point these things out, God was fair and just in everything he did, and he allowed even the destruction (ruin) of his own people however, there was a plan to resurrect them, those there would be those who would spend time in 'paradise (abrahams bosom), or in the dark parts away from paradise, which was known as the place which was a covering for the dead.
Even Jesus went to preach in this place after his death, after the burial for three days, and then resurrection by God's spirit, on the cross.
Another side note isn't that what Kings do in the realm of this reality - Charge their people to do what they need to do in order to gain more land? It seems now today God has done away with the devil, the beast, the false prophet, and overall has acquired to reconcile the whole world unto himself through His son.
Amazing stuff, all in love and respect, to both parties
Matthew