In a nutshell
Last night in a commercial break during Alias, I saw a preview for that show where two families swap moms. The next episode features a very patriotic (Republican-looking gun-owners) family swapping with a peace-loving hippie-type lefty family big on protests. For me, one exchange summed up why the left turns me off:
Republican Mom: You are such a teenager!
Hippie Son of Hippie Mom: YOU ARE SUCH AN IGNORANT AMERICAN!
Yeah, that's it in a nutshell.