I definitely see why you would post this to unpopular. I see why humane an inhimne would be so hard to define.
It’s inhumane for a solider to surrender in a fight and be starved or tortured to death in a prison camp.
It’s humane for a late stage cancer patient to be given a set of drugs to allow them to die without pain.
The middle ground is where it gets real blurry. Hopefully humanity progresses enough to straighten out that middle ground and ideally eliminate it all together.