Progressive Democrats would hate Kennedy
First because he was Catholic. No Christian can be in office that is Christian according to them now.
Catholics abhor Homosexual Marriage now so Progressives would put their hate toward him. And especially on Abortion regardless of what he would say.
JFK was a strong Anti-Communist. Progressives admire it.
JFK was for Tax Cuts and implemented them. Progressive and Democrats are lock step against them.
JFK would not win a DemocRATic nomination now. .
I don't think so, he had more "Profiles in Courage" and principles in his little finger than the whole party does today.