Not true.
In the OT the priests had to minister before the altar with sacrifices and perform circumcisions on the 8 th day and were held blameless.
This was under Gods orders. Of course they were blameless. There is a BIG difference in that and the preacher(or priest) that declares to the congregation "We are going to discontinue Sunday worship from now on and follow Gods Commandments. See you next Saturday." Now truthfully, how would the denomination react to that? The denomination would kick them to the curb and the church would think he's nuts and have nothing more to do with him.