Read the first volume of the Statute at large. 'Our" Congress sent missionary's, under the gaurd of the army, to the "heathen" inhabinants to "convert as many as possible". This was NOT seen as a violation of the Constitution, niether was it, as our government 'lent' armed protection to ALL religions that sought the same goal.
Now to put it to something "we" can all use.
It's called, "EQUAL APPLICATION OF THE LAW". What is good for the goose is good for the gander.
Say you find out by a visit to the county clerk that your nieghbor is only paying 5% because he has a tree in is front yard.Then plant a tree and pay only 5%. Got 'tax free' groups in your county?....Become one.