We need to either further define the separation of church and state or eliminate it.
Nothing to define, since it doesn't exist in any legitimate legal document. The only thing in the Constitution that addresses this has to do with the prohibition the FEDERAL Government has on declaring a specific (Judeo-Christian) sect as the "official" religion (to avoid a situation of the President serving as head of the church of America, a la the King/Queen of England serving as head of the church of England). This is a monument that the people want, case closed. Any of these asshat "jurists" that define it as anything beyond what is states above should be removed from the bench immediately.
We cannot eliminate that which does not exist.
Conversely, nothing in the Constitution prohibited the individual states from adopting official religions, either. It was entirely a state, local, and individual decision.