Rudder, the content of their protest is their business. Concentrate on the freedome of speach issues.
A secret? Christian theology is a secret, you say? Wow, I sure did miss something in my Sunday school lessons.
Let me get this straight.
You can drive/walk down the middle of the street on a float engaging in oral sex, be completely nude with nipple clamps, etc during a Gay Pride parade and its protected as free speech.
However, if you merely stand with all your clothes on an quote from the Bible, you are engaged in “obscene or illegal” speech?
For any that think I am kidding about what happens in plain view of police during Gay Pride parades, take a look here (NSFW and not safe while eating) http://www.zombietime.com/folsom_sf_2007_part_1/
Just like the lambs that the Jews would sacrifice to relieve sins, it came from the fact that God said so! :D