Many of us say it as a half joking/half serious jab, but I think the reality is that many liberals are truly mentally ill. Their response to calm, reasoned positions that others propose is virtually always to emotionally rant and rave like spoiled children. Their blog posts are nearly without exception filled with cursing and wishes for the deaths of their opponents. Their thinking, if you can call it that, is infantile. Don’t get what they want?... they just throw a tantrum and begin hurling names and insults.
Heck, to believe in most of their causes REQUIRES an inability to think rationally. One must be mentally unbalanced to believe: The Earth is a living entity called Gaia, and we are destroying it (him/her?) via the substance we all produce when we exhale; Homosexuality is normal, and is just as viable a foundation for a family as is heterosexuality; Taking on vast amounts of new debt is the best way to solve the problem of having too much debt; Food stamps are an excellent way to stimulate the economy; The government can provide health care for free; The government can provide anything for free, etc....etc.....etc.....
Ever considered that they may be paid agents of the left, or one of the campaigns, even? Do I need to say which one?