Looks like the Sean Hannity/Ann Coulter debate on other threads. I believe that, as a general rule, we should respond to folks in the spirit which they approach us, once you make some effort to discover the truth about this. There are rational activist liberals and leftists, and they should be approached in a reasonable way. Then you have the James Carville types, and if you have to deal with them, you should use the Coulter approach.
Of course a lot of people who have liberal ideas are not seriously political, and have just absorbed their ideas from the zeitgeist. They need to definitely be approached in a more gentle way. As far as the Hollywood types are concerned, they have absorbed a value system as warped as most college campuses. But most of them are simply trying to be agreeable with their colleagues, and some really disagree, but take a protective coloration for their own protection. The ones who have a serious radical political attitude, and are intolerant of other views should be responded to accordingly. Naturally I would never adopt a political attitude on someone's authority as an actor.
(but I wasn't talking about talking heads and activists in my post, I said we need to stop calling the soccer moms evil)