Rehnquist was never actually "hated" much. It was a different era where "hate" in this context was much thinner on the ground. I remember a very "liberal" law prof to whom I delivered mail as the Law School mail boy at the University of Chicago to get some spare change for recreational drugs, that I did not want my Dad to pay for, saying that he thought the man had no heart at the time he was up for nomination. That is about as far as he was moved to go, and we did chat from time to time, since we both seemed to enjoy our encounters.
What did he say about Scalia, Thomas and Alito?
They all came later. This was when Rehnquist was nominated. I moved on to the Michigan Law School as a student rather than a mail boy for the U of C law school.