the cause of thieving

I understand the petty criminal. Let me try and illustrate how it looks to the petty thieves and muggers of the world. Picture a tribe of cave people in a cave sitting around at the end of the day. Family areas with their own little cook fires dot the floor. In one corner, we see a disabled person.  Wearing tattered handmedowns and gnawing on last night's leftovers. No fire. No fresh food. All around are families laughing and smiling in the firelight, waving hunks of fresh meat around, passing bowls of hot soup and commenting at other families across the housing barriers.  They're in a great mood.  it was a good hunt and the hunters all got a bit. But not the disabled guy in the corner, he can't run far enough.  It's only mild CP or whatever, but just enough he doesn't earn a share of the resources.  Now one day this guy, he's just too hungry to care how hard they'll beat him, he's had no leftovers for days, and makes a play for a plate of unattended food. THIEF!
In is POV, they're selfish and inconsiderate. He can't simply vanish from existence and he's suffering and they should either kill him or feed him! But they do neither.  How cruel can it be?  Now he's kicked out and wanders.  he finds other tribes.  Some are the same, but some bring their disabled people into the center where the warmth is and share the food and talk with them and help them find useful tasks to help the tribe. Because that's how humans are supposed to behave.
Now should he feel bad, esconced with his new kind tribe, for having stolen from the others?
"I've got mine, buddy."  "Every man for himself!"  "There isn't enough room for the both of us." "them that's got shall get, them that's not shall lose, so the bible says, and it still is news."  All of the above are NOT human natural. They're superimposed values from the sociopathic element among us. While useful for conquest, these folks shouldn't be telling us how to live together.