Funny. I think JFK said something vague like that to the CIA referring to Diem. Then they killed him and JFK was horrified and said, “I didn’t mean kill him!” They said, “WTF? What did you think ‘take him out’ meant in Vietnam?”
Saint John would never have said anything like that unless Diem was banging one of his girl friends.
As Teddy would say, “I thought she knew how to swim.”
It was more than vague and Kennedy encouraged the coup. You’ll want to see Ambassador Frederick Nolting’s memoir ‘From Trust to Tragedy’.