Basically, these people are saying that Christianity as it has been believed for 2000 years is too "extremist" and should not be allowed. Honestly, I think that their position is the extremist one, particularly as they don't want to allow people to simply continue to believe in a religion as it has for a long time been constituted.
You are completely correct -- but having successfully hijacked a church they are going to make the most of it. (Until it runs out of steam/money, when they'll trash that too and move on.)