It's nice to be appreciated, though my knowledge is pretty shallow,
I still like talking about religion from time to time, and having a reason to Google it.
I don't know why the Biblical God didn't/doesn't give/make his existence more obvious.
(Theoretically speaking as I'm still an Atheist)
If one goes by the Bible literally,
Even 'when people saw miracles or believed in God,
They sure disobeyed and lacked faith a lot.
Bible is full of such. A lot.
Even contemporary life, has many believers,
Who yet act towards their own interests and desires, commit crimes, sins.
Or individuals with a 'seeming spiritual blindness, physical sight not equating to spiritual insight.
New International Version
"This is why I speak to them in parables: “Though seeing, they do not see; though hearing, they do not hear or understand."
Course it seems probable that 'some people would believe if they saw, or understand what they hear.
But maybe they wouldn't see or hear what was 'important.
Perhaps there is something in our uncertainty, yet wanting the right of existence.
"He [God] wants them to learn to walk and must therefore take away His hand; and if only the will to walk is really there He is pleased even with their stumbles. Do not be deceived, Wormwood. Our cause is never more in danger, than when a human, no longer desiring, but intending, to do our Enemy's will, looks round upon a universe from which every trace of Him seems to have vanished, and asks why he has been forsaken, and still obeys."
— The Screwtape Letters, letter VIII, C. S. Lewis
I don't think the above 'sufficiently answers your question,
But it is where my mind went with the question, minus 25%-50% after I accidentally closed my internet browser and had to retype it.
.
Darn, that 'does sound like one of those God commanded sections.
Well, one 'could argue that God did not want any chance that the Israelites would adopt any of their culture.
In the fourth generation your descendants will come back here, for the sin of the Amorites has not yet reached its full measure.”
Of course one could argue that babies 'have no culture,
Might have been a lot of babies though, as well as children,
What's the cut off for when one has no culture?
Did the Israelites have enough means to take care of all the babies of everyone they killed?
I suppose one could argue God could have just made food,
But then why do we have to hunger or die at all?
. . . Religious people often believe in an afterlife,
Is a human lifespan that long compared to X? I say X as I don't know what an afterlife 'would be.
But of course such thinking leads towards a disregard of life,
And potential of ends justifying means if in Gods name,
Course God also says don't murder.
Begging the question on my part I think, but there is a reason this was the last question from your initial post I answered, and even when I answered, tries to avoid.
Ah well, gets me thinking on the question at least, I suppose.