If it had been the intent of the founders to fully seperate church & state, don't you think they would have addressed that in the Federal Constitution, instead of leaving that power to the states?
In colonial times your religion was the religion of the colony you lived in.
Not true.
That was changed by the separation of church and state.
However did that happen, when most of the states had official state churches at the time of the founding?
Do you really believe that separation of church and state would have been overwhelmingly supported if all those guys were Christian and wanted a Christian America?
It takes someone with no understanding of the Christian faith to make that statement. You are confusing "Christian state", national, with "Christian state", as in states, based on the "community standards" of each of the states.