Most mass shootings have lately been by crazed racists, anti-semites or nativist psychos, not leftists. But don’t let the facts deter your contempt for liberals.
While we're at it, your phrase about liberals in your signature is truly lacking in nuance and decency. How would you like a signature that stated "Conservatives killed Jesus, Europe's Jews and enslaved millions of Africans and don't give a damn about anyone except themselves?" More truth to it than your signature. Liberals like Thomas Jefferson, John Adams, etc. gave you the country where you are free to slander those with different policy preferences than your own. Have some decency at long last Mitch.
PS--I'm wrong about the poll. I assumed it was some Breitbart or Fox News disinformation, but it's not. It just shows that participants and researchers have a better sense of humor than Mitch. It's meant as a joke. You neglected to mention that almost 1/3 of the self-identified Republicans/conservatives agreed with the meteor strike preference