The fact that God is able to means that it isn’t an idle threat.
Why bring up another red herring? No one ever said it is an "idle threat". You are just rrying to demonize. Knock it off already.
It is a real ability. No doubt about it. But you just cannot prove that God WILL cause souls to cease to exist. That's your opinion, fine.
But you have zero evidence that He either HAS done so, or WILL do so.
We’re supposed to fear God for that very reason.
The word "fear" includes 'awe, respect, etc". We are NOT to shake in our boots. We are to have total awe and respect for Him.
If God won’t do it then there’s nothing to fear.
I think you might want to check that fresh bullet hole in your other foot about now. There is everything to be afraid of, knowing that He will, rather than simply make your soul disappear and then experience NOTHING ever again, torment YOU day and night for ever and ever.
Atheists will be mighty disappointed when they realize they are going to be in the LOF day and night for ever and ever.
God will destroy soul and body and hell because that’s simply the alternative to living forever.
Your ignorance is unbecoming of you. God IS ABLE TO, but no verse says that God WILL. Face reality!!
To say "that is simply the alternative" is arrogant, as if you have all the answers when you don't even have 1 answer.
There are no bodies in hell, for starters. Only the conscious souls of unbelievers. At their resurrection, they will again be back in their resurrected but still mortal bodies for the GWT judgment. And when they will be cast into the LOF, their mortal resurrected physical bodies will be completely destroyed, and perish. But their conscious soul wil be "tormented day and night for ever and ever."
Matthew 10:28
28Do not be afraid of those who kill the body but cannot kill the soul. Instead,
fear the One who can destroy both soul and body in hell.
See? "able to" does NOT mean "will". I will repeat this as often as necessary to help you understand.