Jack Black has canceled his band Tenacious D’s tour over comments made by bandmate Kyle Gass, but fans are hitting out at Jack’s decision. “You can’t kill the metal,” Jack Black sang on the fan-favorite Tenacious D song The Metal, but as it turns out, you can kill a tour with just five words. Many know the 54-year-old as an actor in Hollywood blockbusters and indie gems, but he’s also been hailed a music god as one-half of Tenacious D alongside Kyle Gass. Best known for songs like Tribute, the duo recently took their comedic stylings out on tour. However, that tour has since been canceled foll…