Renowned stand-up comedian Jerry Seinfeld made headlines this week for criticizing the “extreme left” for ruining comedy. The quote came out during a wide-ranging Sunday interview with The New Yorker about the state of comedy and Seinfeld’s upcoming film “Unfrosted.” When asked about how the “serious aspects of the world” are impacting comedy, the ’90s sitcom star claimed that “the extreme left and P.C. crap” are to blame for the lack of universally praised comedy television shows. “It used to be, you would go home at the end of the day, most people would go, ‘Oh, “Cheers” is on. Oh, “m*a*s*h”…