"contrived", "motivated", "pushed", "external" vs. "internal", etc. These are all very complex issues... issues that our 'legal system' wrestles with all the time.
Into the mix is thrown "responsibility". When 'driven to a certain point' by circumstances, is a person still 'responsible' for their actions nonetheless? An entirely different question.
Sauron used his usual schemes of lies, deceit, and fear to let
Denethor see only what he wanted Denethor to see.
Denethor did the interpreting.
The entire exchange of some 3-4 pages between
Gandalf and Denethor needs to be carefully evaluated.
In the end what we see is simply a man driven mad by responsibility, hopelessness, despair and failure in his charge as essentially the last bastion of
Men against the enemy (from his perspective).
It's true Sauron "contrived" many of the
events,
armies, abilities of Denethor's
palantir, etc. to bring an end to the times as they were. (Note the change in point of reference Gandalf makes at this point in the discussion.) That said, remember it was
Saruman whose
Orcs killed
Boromir, not Sauron. So certainly Sauron did not 'contrive' that situation.
No, what we come down to is simply a man who has been broken by responsibility and events, and is no longer in possession of his faculties, so is impaired in his decision making.
Gandalf's appeal is both to Denethor's sense of morality, and to his sanity. But Denethor cannot be restored.
Would the 'act' of taking
Faramir's life along with his own have been an '
evil' act? Certainly. Is the 'act' of Denethor burning himself alive an 'evil' act? Gandalf certainly saw it as such.
"‘Authority is not given to you,
Steward of Gondor, to order the hour of your death,’ answered Gandalf. ‘And only the heathen
kings, under the domination of the Dark Power, did thus,
slaying themselves in pride and despair, murdering their kin to ease their own death.’
Yet all Gandalf's final efforts failed.
Clearly Denethor's 'motivation' was pride and despair, just as were the motivations of those he chose to follow from of old. He himself spoke of it. "We will burn like heathen kings before ever a ship sailed hither from the West." So he was not without a certain awareness of what he was doing. He was wise, before he fell into folly.
Overall he is a picture of tragedy no doubt. But were his final decisions without an evil motivation? Is he still not 'responsible' to make correct choices unto the end?
These are the question and
battles of our Legal system at every turn. At what point is a person no longer 'responsible' for what they choose to do.
if we can forgive
Frodo for failing at the end and in pride and despair claiming
the ring for his own, can we not also forgive Denethor at the end of his tremendous pressures to protect
Middle-earth from Sauron, losing his favored son, sending his other son to be murdered (though he survived), etc.??
Was there evil in Frodo's motivation to claim the ring? Certainly. Was there evil in Denethor's motivation to burn himself and his kin in his failures? Certainly.
They did have their own motivations. They were also both broken people unable to further resist the motivations that ultimately took them.
I do not personally think we can separate 'motivation' from 'action' so simply as we often try to do. What needs to be assessed is the circumstances before and during the events to understand all contributing factors.
i.e. we are ALWAYS responsible for what we decide to do. Nobody else. The motivations and the choices are our own, within the moment. The only question is who we are at the point we make those choices.
A simplistic example: When we are 'feeling well' we treat people nicely. Our motivations are good. When we are feeling a little ill, our resistance may be down, and we may ill-treat someone and need to apologize later. Our motivation was quite selfish. When we are dying...what do we do...? Do we 'not care' any more and just 'let fly' with all our thoughts etc. at others' expense?
The day constantly comes for each one of us in many many ways when we are faced with the choice to 'do good or evil'. How do we fare? Yes, it's just this simple.