It turns out that there are plenty of good reasons to despise him. This helpful reminder comes from The Natives are Restless a good friend of Foxxylove.
Alan Dershowitz gives him his "respect."
"As a law clerk, Rehnquist wrote a memorandum for Justice Jackson while the court was considering several school desegregation cases, including Brown v. Board of Education. Rehnquist’s memo, entitled “A Random Thought on the Segregation Cases,” defended the separate-but-equal doctrine embodied in the 1896 Supreme Court case of Plessy v. Ferguson. Rehnquist concluded the Plessy “was right and should be reaffirmed.” When questioned about the memos by the Senate Judiciary Committee in both 1971 and 1986, Rehnquist blamed his defense of segregation on the dead Justice, stating – under oath – that his memo was meant to reflect the views of Justice Jackson. But Justice Jackson voted in Brown, along with a unanimous Court, to strike down school segregation. According to historian Mark Tushnet, Justice Jackson’s longtime legal secretary called Rehnquist’s Senate testimony an attempt to “smear the reputation of a great justice.” Rehnquist later admitted to defending Plessy in arguments with fellow law clerks. He did not acknowledge that he committed perjury in front of the Judiciary Committee to get his job."