From this blog, Jan. 26, 2011: Fantasy role-playing games
That bogus abortion/slavery analogy is one that I used to find compelling and reassuring. It was a frequently invoked analogy in the evangelical community. We found it inspiring, but not because we knew much of anything about the actual abolitionists, slave or free. And not because we knew anything much at all, for that matter, about abortion. The inspiration didn’t come from any perceived historical accuracy or from the logic of an argument from analogy.
What was inspiring was being told that we were on the right side of the great moral struggle of our time. That claim didn’t have to be accurate or true or logical. It wasn’t meant to appeal to accuracy or truth or logic. It’s an emotional appeal. It’s the thrill that comes from being told that you are part of a great epic struggle — that even without ever really doing much of anything you will be looked back upon by future generations as a hero.
Just assent to the proposition, cast your reliably partisan votes, attend the occasional photo-op vigil and learn to frown disapprovingly at the designated people. Do these things and you can regard yourself as being Harriet Tubman’s equal in virtue, courage and commitment.
The function of the abortion/slavery analogy, in other words, is fantasy role-playing. It’s a game of make-believe, of dress-up and pretend.