John Lennon compared "Give Peace a Chance" to Elvis Costello's "(What's So Funny 'Bout) Peace, Love, and Understanding." A rabbi inspired the former.
Some classic rock stars got credit for things they didn’t do. John Lennon’s “Give Peace a Chance” was inspired by a phrase he didn’t coin. Interestingly, the tune was inspired by a rabbi who was also a folk singer.
Source:Matthew Trzcinski/Cheatsheet