Well, since we're splitting hairs, I said "the Kennedys appear to have been interested" which is not a claim that I knew for sure. Plausible deniability keeps us from knowing the full extent. The Castro assassination plots were confined to a select few within the White House Special Group (SG-A) and the CIA, along with liason Lansdale at Defense. RFK chaired the SG-A but I believe he was also briefed in his AG office.
There are some who suspect President Kennedy knew in advance of the assassinations of Rafael Trujillo and President Diem.
The "Cuban Project" was also known as Operation Mongoose. It was run by Air Force Major General Edward Lansdale from the Defense Department, with assistance from William King Harvey at the CIA.
"The Cuban Project played a significant role in the events leading up to the
Cuban Missile Crisis of 1962. The Project's six-phase schedule was presented
by Edward Lansdale on February 20, 1962; it was overseen by Attorney
General Robert Kennedy. President Kennedy was briefed on the operation's
guidelines on March 16, 1962. Lansdale outlined the coordinated program of
political, psychological, military, sabotage, and intelligence operations as well
as assassination attempts on key political leaders."
-- Wikipedia
You were seemingly implying - I can't read your mind - that the Kennedys were interested in killing numerous foreign leaders. As in multiple figures. In fact, the evidence I've seen is that they were "interested" in just one: Castro. And more than just "interested". I think they were quite aware of the plots and implicitly if not explicitly approved of them.
As to Diem and Trujillo: Again, where's the evidence? Didn't Lodge offer Diem and his brother protection in the US Embassy? And they rejected it? I don't think there's any evidence that JFK approved of or signed of on their murder. Same with Trujillo. No US government involvement.
As to the Wikipedia quote: there's no source for the claim that Mongoose also involved the assassination plots against Castro. Again, my understanding is that those plots were organized and run under a more secret program or programs. Mongoose was pretty well documented - there's a long paper trail - and I find it hard to believe that the Castro plots would have been part of it.