Read the US Constitution...it does not specifically call for the separation of church and state.  The organization of a church is a legal incorporated entity under US law, given tax breaks for their nonprofit activities.  They cannot use their resources to influence, promote, and encourage/influence the laws of the land.  Specifically, discriminate against any citizen of America.  Their membership, as individual citizens, can!  The bible teaches:  "...leave to Caesar, what is Caesar's."