system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] Would Elrond be capable of killing Isildur in Mt. Doom to destroy the Ring?

Isildur obtains the Ring and proceeds up Mt. Doom with Elrond close behind. Elrond stands on the bridge as Isildur stands at edge with the One Ring. Elrond demands that he destroy the Ring. Isildur refuses and starts to walk out.

At this point, Elrond has a chance to destroy the Ring for good, but at a cost: pushing Isildur into Mt. Doom, and possibly losing his own life in the process.

Elrond apparently had no issue allowing other elves to die in a war against the Orcs, and clearly values the greater good enough to sacrifice lives in its service.

So did Elrond simply lack the will to kill Isildur? Was he under the sway of the Ring? Did he value his own life too much to risk it to destroy a great evil? Or did Elrond hold back because he thought this was part of Eru Iluvatar's plan for the world?

Why didn't Elrond intervene further?
gpt
Well, the first reason Elrond didn't simply throw Isildur into the fire was the fact that in the book, the two are nowhere near Mount Doom.

Second, Orcs are way less dangerous without somebody leading them, and Elrond wasn't sure if Sauron was capable of returning. He probably suspected something, but was far from certain. Elrond is wise, but not clairvoyant.

Third: Isildur was not only one of the last descendants of Elrond's brother, but with Elendil and Anarion dead, he was the undisputed high king of Arnor and Gondor. You don't just kill somebody like that for a goal that for all you know may be achieved without that sacrifice.