You don’t think the decedent deserves any responsibility for antagonizing and threatening to kill them?
No. They should have walked away. The weapons are for protection, not to get the upper hand in a stand off - for the very reason of what happened in this instance.
If you are carrying as a CCW holder or otherwise, you do not seek out conflict. To the contrary, you avoid it knowing that if you need to - and only if you need to - you have protection with your weapon.
They deserve to go to jail for a long, long time.