"Dershowitz felt like an outsider at law school. He has written that, when he gave his first presentation, his 'accent was openly laughed at'..."

"... as was his 'non-preppy garb, which included Bermuda shorts with a Phi Beta Kappa key ostentatiously dangling from a pocket.' He kept kosher, which meant that he couldn’t eat in the common dining room, and he didn’t drive or work on the Sabbath. When he was being considered for the position of editor-in-chief of the Yale Law Journal, classmates asked if his religious observance would interfere with editorial responsibilities. He got the post anyway. During his second year, he applied to some thirty Wall Street law firms for a summer job and was rejected by all of them... Dershowitz graduated at the top of his class... [clerked] for two esteemed liberal judges... was hired as an assistant professor at Harvard Law School, and at twenty-eight became a full professor."

There's much more than that in "Alan Dershowitz, Devil’s Advocate/The noted lawyer’s long, controversial career—and the accusations against him" by Connie Bruck (in The New Yorker), but I haven't read it all and it's too much to summarize.