Stockholm  — A Stockholm court on Tuesday jailed four men for hate crimes for assaulting immigrants in a case that has shone a spotlight on a growing movement of white supremacist fitness clubs that some experts believe have their roots in California. The four men, aged 20 to 23, are members of an "Active Club" — loosely structured groups that meet in gyms and aim to promote white-nationalist, misogynist and hyper-masculine ideology. They were given prison sentences ranging from three to three-