I believe I did but that was one of the questions you didn't answer. I'm happy to hear the answer now.
Seems like there was a bit of a communication gap between us there. I assumed you were going to follow up after we established you didn't believe God actually gave that command. That way it would have been cleaner with you asking me a question rather than me trying to state your question for you. But here goes... If I understood you correctly, you believe that if I believe that it was Jewish embellishment and the genocide was not God's desire, I'm saying the Bible is not the work of God and is not to be trusted and my house of cards for God collapses. Right?
The short answer is no that's not what that means at all.
First of all, I believe the word of God is anything which is true because God is truth, as God is every extant attribute of reality. In other words, it doesn't necessarily have to be written in the bible to be the word of God. It only has to be the truth.
Secondly, God didn't write the bible. Fallible men wrote the bible. Fallible men who were inspired by the Holy Spirit which used their fallibility to write these accounts in certain ways for certain purposes only known to the infallible Holy Spirit.
Lastly, the point of these historical accounts are true - historical battles did occur. The intent of the account is to record that history, not that God commanded it. The details are embellished for a number of reasons with the most obvious being since they were victorious they concluded God is great and on their side. In some cases the accounts were embellished to make the accounts more memorable (Genesis and Exodus to name two) so that they could be passed down orally from generation to generation more easily. In other cases - like the one we are discussing - the accounts were embellished so that a broader, more nuanced, truth across the books could be shown. You have to contrast the accounts of their victories with the accounts of their defeats and place that contrast in the context of their entire history to understand the broader, more nuanced truth which is this... the OT is the account of a people who cycled between remembering and forgetting God. Their experiences can be summarized by saying successful behaviors (remembering God) naturally lead to success and failed behaviors (forgetting God) naturally lead to failure. This is a true statement. Without the embellishment it wouldn't be possible to distinguish that truth from the historical accounts of victory and defeat. As it is in the accounts of defeat that they conclude that they didn't lose because God isn't great and not on their side, but because there was something God wanted them to learn.