It’s easy to see how a soldier or a murderer may have ill-will towards their enemy or their victim. It’s easy to imagine how a soldier or a murderer may be indifferent to the suffering of their victim.
What about a doctor who is asked to end the life of a patient seeking euthanasia? In some instances, when euthanasia was illegal almost everywhere, some doctors administered lethal doses of drugs that they new would lead to the death of the patient.
The doctor behaving in this way was not indifferent to the suffering of their patient. Their intention was to end the suffering of their patient and, they were acting in accord with their patients request.
The same with many vets. They don’t have ill-will towards the animals they euthanase. They don’t seem to kill animals because they hate them. That’s not their motivation - not even close!
It would be an improvement in warfare if they had major technological improvements in some weaponry. One day they may have sci-fi type stun-guns or, robots doing the fighting.
I would think a lot of soldiers - and armed police - would prefer to use nonlethal weaponry if that is possible. Police use electric stunners if its possible and pepper-spray.
It may be the case that strong ideological adversaries in a war may have a hatred of the enemy but many soldiers may just be following orders and trying to stay alive. They may be driven by a desire to stay alive and less so, by hatred of the so-called enemy.
Most of us seem to recognise a difference between killing in self-defence and, killing as an overt act of aggression.
Self defence is about self-preservation. There may not be a hatred of an aggressor. Instead, there is an awareness of a clear and present danger and an intention to eliminate the threat.
In a situation like this there may be no ill-will or indifference to the suffering of an aggressor. It may be a situation where it’s a choice between killing or, being killed.
A violent aggressor in this situation may be motivated to terminate a life - with extreme prejudice.
One kills in order to preserve life - under duress - while the other is motivated to behave the way they do for a different reason.
Some may consider euthanasia as an appropriate course of action because they feel compassion for a dear one/dear ones. They may see the writing on the wall and don’t wish to be a burden on others when their condition worsens.
I understand that being cared for by others can be a wholesome situation for everyone involved - that’s not the point. The point is, the motivation behind the intention to stop living this life.