Marriage is purely religious.  Jesus confirmed the path to marriage by citing the first divine law, Genesis 2:24-25, as the union between male and female.  There is no such thing as "secular marriage" therefore, any true person of faith can not service or participate in any event that celebrates mockery of the divine law.  This is an egregious sin and has eternal consequences.  If there is such a secular law for marriage, cite its authority?  Stealing divine laws and claiming them to be secular is a deception that will not be overlooked by the people of faith.  Further, the government violated the first amendment with the marriage decision since it clearly states that the  government shall make no law respecting religion or the free exercise thereof.