The 2010′s[1]

2010: Hartford Beer Distributor Shootings: Omar S. Thornton, 34, shot up his Hartford Beer Distributor workplace after facing disciplinary issues, then committed suicide:9
2011: Tuscon Shooting: Jared Loughner, 22, opened fire outside a Safeway during a constituent meeting with Congresswoman Gabrielle Giffords (D-Ariz.) before he was subdued by bystanders and arrested:6
2011: Ihop Shooting: Eduardo Sencion, 32, opened fire at an International House of Pancakes restaurant and later died from a self-inflicted gunshot wound:5
2011: Seal Beach Shooting: Scott Evans Dekraai, 42, opened fire inside a hair salon and was later arrested:8
2012: Su Jung Health Sauna Shooting: Jeong Soo Paek, 59, returned to a Korean spa from which he’d been kicked out after an altercation. He gunned down two of his sisters and their husbands before committing suicide:5
2012: Oikos University killings: One L. Goh, 43, a former student, opened fire in a nursing classroom. He fled the scene by car and was arrested nearby a few hours later:7
2012: Seattle Cafe Shooting: Ian Stawicki, 40, gunned down four patrons at a cafe, and another person during a carjacking nearby, then shot himself as police closed in. (He died later that day in a Seattle hospital:6
2012: Aurora THeater Shooting: James Holmes, 24, opened fire in a movie theater during the opening night of “The Dark Night Rises” and was later arrested outside:12
2012: Sikh Temple Shooting: U.S. Army veteran Wade Michael Page, 40, opened fire in a Sikh gurdwara before he died from a self-inflicted gunshot would during a shootout with police:7
2012: Accent Signage Systems Shooting: Andrew Engeldinger, 36, upon learning he was being fired, went on a shooting rampage, killing the business owner, three fellow employees, and a UPS driver. He then killed himself:7
2012: Newtown Shooting: Adam Lanza, 20, shot his mother dead at their home then drove to Sandy Hook Elementary school. He forced his way inside and opened fire, killing 20 children and six adults before committing suicide:28
2013: Mohawk Valley Shootings: Kurt Myers, 64, shot six people in neighboring towns, killing two in a barbershop and two at a car care business, before being killed by officers in a shootout after a nearly 19-hour standoff:5
2013: Pinewood Village Apartment Shootings: Dennis Clark III, 27, shot and killed his girlfriend in their shared apartment, and then shot two witnesses in the building’s parking lot and a third victim in another apartment, before being killed by police:5
2013:Santa Monica Rampage: John Zawahri, 23, armed with a homemade assault rifle and high-capacity magazines, killed his brother and father at home and then headed to Santa Monica College, where he was eventually killed by police:6
2013: Hialeah apartment shooting: Pedro Vargas, 42, set fire to his apartment, killed six people in the complex, and held another two hostages at gunpoint before a SWAT team stormed the building and fatally shot him:7
2013:Washington Navy yard Shooting: Aaron Alexis, 34, a military veteran and contractor from Texas, opened fire in the Navy installation, killing 12 people and wounding 8 before being shot dead by police:13


missing is one big one around Bushs term...umm 9/11...
most had mental issues, and most are probably white and American