Director Rich Peppiatt‘s rowdy, frenzied film “Kneecap” is a lively biopic based on the hell-raising Irish rap trio of the same name. You’ve probably never heard of these musicians, but the film celebrates the general sense of anarchy as these young men become key figures in a civil rights movement to save their mother tongue. It’s a story about finding your voice in a world that seems determined to keep you down, all told with a slew of swear words, hip-hop tracks, and lots of drug-fueled shenanigans. Set in West Belfast in 2019, the film depicts the origins of the group Kneecap, including...