I actually think that it might be useful to term the misinterpretation of the establishment clause on its head.
Argue that Darwin and other evolutionists are Creationists or in some way religious. The kind of cross examination of Behe in Dover is a great example of where the simple admission that someone is a Christian proves they have an establishment agenda. That is one of the glaring weaknesses of the Dover decision.
Find some evolutionists to admit on the stand that they are Christians and arguably that is an establishment violation.
Something must be done to expose the presently backward interpretation of the establishment clause.