I think Trump genuinely doesn't like people being killed, but he's also driving a wedge in the US that can't be ignored. Sending American troops against its own citizen: not exactly Nobel-prize worthy.
This is a strange thought considering his actions.
Between drone strikes, mishandling of COVID, dismantling of foreign aid, defunding American health care, cutting off Ukraine support at several critical moments, encouraging and materially supporting Israel, he may actually end up (or already be) responsible for the most deaths of any president.
While I do understand this might be true in essence, things are a lot more complicated. He's said some heinous things that riled up actual loonies into a frenzy more than once. Deliberately. Not peace price material IMHO.
(To be fair, I generally lean left, but I don't agree with Obama getting the prize in 2009 as well, what with the targeted assassination program and all)
Its almost like there should be a Nobel "anti-prize" denouncing these people.