It used to be hard to take these California punks seriously. They always seemed like a cartoon version of the Clash. All that changed with American Idiot, the band’s best-selling, Grammy-winning rock opera denunciation of George W. Bush. Now the trio, led by Billie Joe Armstrong, has delivered another classic, full of brash, confident attacks on religious and political hypocrisy. Divided into three acts, “Heroes and Cons,” “Charlatans and Saints” and “Horseshoes and Handgrenades,” it’s a brave, socially conscious epic.