Barry Hertz from The Globe and Mail gave the film 2.5 out of 4, stating: "With Stupid Young Heart, director Selma Vilhunen attempts to dissect the attraction a fringe group might offer for the youthful and dispossessed, and while her intentions are noble, the execution is as shaky as the current geopolitical environment."[5] Michael McNeely from "That Shelf" said: "Limited characterization and a static plot prevent the film from soaring."[6]
Michelle da Silva from the newspaper NOW Toronto liked the film giving it 4 stars out of five, describing it as "much more than a teen romance" and writing: "Vilhunen explores real hardships of the working class, and her portrayal of teens is heartbreakingly authentic. Honkonen and Ristseppä give sensitive performances that will haunt you after the final scene."[7] For The Canadian Press, David Friend said, "while 'Stupid Young Heart' ties up a complicated story too easily, it draws some light to how fringe groups find weakness and exploit it for their own agenda."[8]