'Shortly after the publication of Dershowitz's The Case for Israel (2003), Norman Finkelstein of DePaul University said the book contained material plagiarised from Joan Peters' book From Time Immemorial. Dershowitz denied the allegation. Harvard's president, Derek Bok, investigated the allegation and determined that no plagiarism had occurred. Los Angeles attorney Frank Menetrez wrote an article in support of Finkelstein's charges. Dershowitz wrote an article replying to Menetrez, characterizing the charges as politically motivated by Dershowitz's support for Israel.
In October 2006, Dershowitz wrote to DePaul University faculty members to lobby against Finkelstein's application for tenure, accusing Finkelstein of academic dishonesty. The university's Liberal Arts and Sciences faculty voted to send a letter of complaint to Harvard University. In June 2007, DePaul University denied Finkelstein tenure.'
He's a horrible pice of work. Look at the photo on the Wikipedia page. Devilish. As for his friendships with Epstein and Weinstein, they say it all.