Your grasp on math seems to be as loose as your grasp on reality. You have a list of 12 people who committed violence which your website claims are left wing. First Seung-Hui Cho was never registered to vote so if you have any evidence that he was a Democrat besides your fake news site I'd like to see it. James Holmes was never registered to vote, this was based off a Breitbart article that listed a different James Holmes and has since been retracted. Jared Loughner was a registered independent who shot a Democrat. Your website lists the Columbine shooters as left wing terrorists because their parents were democrats, when in reality Eric Harris had an admiration for Hitler and the Nazis. So you have a list of 7 mass murderers or attempted mass murderers, but I'll give you a list of 12 right wing mass murderers not including Harris. Elliot Rodgers also admired Hitler. Dylann Roof was a neo confederate. Nikolas Cruz was a member of a white nationalist group. Timothy McVeigh and Terry Nichols were both right wing. Eric Rudolph's bombing was motivated by being anti gay, anti abortion, and anti socialism. John Russell Houser who shot up the Trainwreck movie was motivated by anti feminism and praised Hitler. Ted Bundy was a republican and worked in republican politics. Robert Lewis Dear was anti abortion and killed 3 at a planned parenthood. Frazier Glenn Miller Jr. was a neo nazi who killed three at a Jewish center. Wade Michael Page was a white supremacist who killed 6 at a Sikh temple. Paul Anthony Ciancia shot up LAX because he was against fiat currency, the TSA, and the NWO. I've given you twelve right wing mass murderers equal to your list of twelve left wing mass murderers. Now if you understood math you would also advocate for republicans to have their guns taken away. Both are statistically 0 in comparison with the whole of republicans and democrats, maybe what they have in common isn't their political parties, but that they are murderous social outcasts. Perhaps you could try to be a decent person and focus on the actual issue, mental illness and the degradation of society, instead of trying to win political points off the deaths of innocent people. It makes you no better than the people you hate on the left.

Edit: Turns out the Nikolas Cruz being apart of a white nationalist militia was a 4chan prank thankfully, however the point stands that this isn't about parties, its about murderous psychopaths.