They’re a Finnish band called Pertti Kurikan Nimipäivät. I don’t know what it translates to in English. Google didn’t help much but I DIGRESS AND THESE GUYS KICK ASS.
They came together in a non-profit workshop in 2009 on guitarist Pertti Kurrika’s nameday (oh, I get the name now). They’ve got a bit of a cult following and they use their music to raise awareness about people living with mental deficiencies.
They also have a documentary called The Punk Syndrome. Watch the trailer here: