-- The Left is prone to hysteria.
-- The Left believes that if The New York Times and other liberal news sources report something, it is true.
-- The Left believes in experts. Of course, every rational person, liberal or conservative, trusts the expertise of experts -- such as when experts in biology explain the workings of mitochondria, or when experts in astronomy describe the moons of Jupiter. But for liberals, "expert" has come to mean far more than greater knowledge in a given area. It now means two additional things: One is that non-experts should defer to experts not only on matters of knowledge, but on matters of policy, as well. The second is that experts possess greater wisdom about life, not merely greater knowledge in their area of expertise.

-- People who don't confront the greatest evils will confront far lesser ones. Most humans know the world is morally disordered -- and socially conscious humans therefore try to fight what they deem to be most responsible for that disorder. The Right tends to fight human evil such as communism and Islamic totalitarianism. The Left avoids confronting such evils and concentrates its attention instead on socioeconomic inequality, environmental problems and capitalism.
-- The Left is far more likely to revere, even worship, nature. A threat to the environment is regarded by many on the Left as a threat to what is most sacred to them, and therefore deemed to be the greatest threat humanity faces.

-- Leftists tend to fear dying more. That is one reason they are more exercised about our waging war against evil than about the evils committed by those we fight.