JFK was a mixed-bag, but probably the one area where he did the most damage was in the altering of immigration policy, which has led us to where we are today.
In the 60’s, JFK, RFK, and Teddy were all in the formative stages of Leftist politics. The Kennedys were all about the gov’t (”ask what you can do for your country...”).
The debauched and ruinous Teddy Kennedy in the 80’s and 90’s is a good picture of where JFK was headed, morally and politically.
All this “Camelot” about JFK is a bunch of bone-headed nonsense - the Bleeding Heart “Liberal” (personified by the “peace and love” hippies) unmasked as today’s America-and Freedom-Hating Fascist Leftist.