Except that many mass shooters are apolitical nut jobs (including Lanza, not sure why you are assuming he was political). Point is, without even knowing who this guy is or why he did what he did, you can’t just presume to know his politics.
no one is apolitical. Nutcases are influenced by politics. Heavily. The unibomber being one example.
Do you see conservatives regularly mass murdering? No. Because they have a political philosophy that says gunning down the f-211 is wrong.
Do you see liberals sending mail bombs to save the planet from evil right wingers? Yes you do. Neither the conservative nor the liberal has to have a Gore or Reagan bumper sticker. Neither has to cast a vote. But they very much do have a political philosophy.
Anarchists have one. Hipsters have one. Everyone has one. And the liberal philosophy they share leads to death. History is what it is.
You are mentally compromised to begin with if you back a liberal political philosophy. because liberalism is insanity in the clinical sense. The primacy of ‘personal belief’ over factual reality.