It seems to me that JFK's support for the removal of Diem (and his brother) undercuts the allegation that he had decided by November to leave Vietnam, to withdraw US forces. If he made that decision then why deepen US involvement by supporting a coup? What was the purpose of a coup if the plan was to leave? As Reeves argues, supporting the Diem removal is akin to Colin Powell's observation about Iraq - "If you break it, you own it." If you remove the government, if you essentially "break it", then you have an obligation to put one back together. Or try to. Which is what LBJ tried to do afterwards.
Yes. The CT narrative does not make sense. Kennedy decides we have to give up on South Vietnam. That he needs to get all the troops out of there. But before he does that, he decides to support a coup. That makes no sense. If he thinks South Vietnam is doomed anyway, what’s the point of the coup? And when South Vietnam does fall, people will blame Kennedy saying it wouldn’t have happened but for the coup.
What does the coup buy him if he thinks we should get out of South Vietnam?
It seems to me that this whole narrative is just to support a notion that Moscow would fully support. That we have not lived in a true Democracy for almost 60 years. That just like Russia, the America is governed by a group that has never been elected.