The suspect in the mass shooting in Boulder, Colorado had a short temper and was violent, according to former sports teammates. Ahmad Al Aliwi Alissa, 21, “was kind of scary to be around,” Dayton Marvel, who was on a wrestling team with the suspect, told the Denver Post. Alissa once threatened to kill people during an especially heated moment, Marvel said. Angel Hernandez, another former wrestling teammate, recalled how another wrestler at one point teased Alissa, telling him that if he was a better wrestler, he would have won a match that he lost. Alissa “just lost it” and “started punching him,” Hernandez said. Both said Alissa often talked about the idea that he was targeted by others because of his Muslim faith. “He would talk about him being Muslim and how if anybody tried anything, he would file a hate crime and say they were making it up,” Marvel …