I see your point, but these Bishops are publicly funded vis-a-vis their tax-exempt status and under those conditions it just might be the case where... The Bishop doth protest too much, (methinks).
“Me thinks” you do not know of what you speak. A bishop’s duty is to correct misconceptions of doctrine. If you beleive his “tax exemption” prevents him from doing so, then in effect you are admitting that his “tax exemption” is restraining his right to the free excercise of religion and speach.