This is possibly one of the silliest things I've ever heard. There's only reason anyone who makes this claim can give: he's a hawk
guess what, there's always been hawkish Democrats. Anyone who thinks Joe Lieberman is in the wrong party needs to seriously examine his entire voting record (and by the way, I HATE HATE HATE Lieberman, this being one of the reasons). Plus I dare you to find a politician from the era who wasn't a hawk.
Henry Wallace
You're right of course, except for the expletives at the end...Claiming Nixon showed good grace in 1960 is even worse.