See what I wrote to Penguin earlier, who observed that "Christians are not Christ." In fact, Christian theology teaches that we are, in fact Christ. Therein lies the difference. While we are not the political ideologies we espouse (even though those ideologies are espoused out of a sense of who we are), and even though we are not actors whom we adore, we are Christ, whom we espouse. There simply is, metaphysically, a much deeper level of self-identity present in religious faith than in political alignment.
But even with the lesser level of identity, I don't believe we should make fun of peoples' political philosophies, either. Sure, make fun of the candidates and state that you believe the policies, legislation and platforms are not what's best for us. That comprises freedom of speech. But don't disparage them. That helps no one, is poor form, and hurts people.
As Jay (I believe) said somewhere in the thread, it may be legal and our right to say what we want -- but why should we want to say harmful things?