I was just yesterday going through AskHistorians posts about Kissinger. I thought this one was the most informative: http://www.reddit.com/r/AskHistorians/comments/1tqldy/why_do_people_hate_henry_kissinger_is_there/

Not quite what you asked, but that top comment is a pretty juicy appetizer.

There was also one about his actions within the Nixon administration and the tension he created while shaping/transforming the role of his office, but I can't seem to find it. I'll edit if I do!