Shifts in court views do not change what the Constitution says.
" 'If the posted copies of the Ten Commandments are to have any effect at all, it will be to induce the schoolchildren to read, meditate upon, perhaps to venerate and obey, the Commandments,' said a unanimous three-judge panel of the U.S. Court of Appeals for the 5th Circuit, in New Orleans. 'This is not a permissible state objective under the Establishment Clause,' the provision of the First Amendment that forbids any government establishment of religion."
Louisiana's law requiring the Ten Commandments in every classroom likely violates the First Amendment, a federal appeals court ruled.
www.edweek.org
Do you have a particular reason for believing that the Establishment Clause *shouldn't* be binding on the states?