Only a person who thinks on a single axis could possibly believe the two parties are the same in any meaningful way. Reality is more complex than that.
I heard a great multi-part series on NPR focusing on interviews right before his death. If I wasn't lazy or thought you'd actually be interested, I'd find em and link em. Here we are though.
Behind the Bastards has a 6-part show all about Kissinger. Dave and Gareth from The Dollop are guests, it was pretty enlightening to someone who grew up never really learning anything about Kissinger except that he was a behind the scene policy guy for decades.