As I write this, I am praying that the point gets across in a loving and meaningful way to those who need to hear it. (Ephesians 4:15 Rather, speaking the truth in love, we are to grow up in every way into him who is the head, into Christ.)
2 Corinthians 5:17 -- Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.
This means that when you become a Christian, everything you have ever done in your past is gone. God forgives you for your sins. Just like in Psalms 103:12, which says: "As far as the east is from the west, so far hath he removed our transgressions from us." So, the fact that Mrs. Davis has not had a perfect past is moot. And, as Christians, it is our duty to support other Christians during their times of tribulation, in spite of who they once were. (Colossians 3:12, 13 - Put on therefore, as the elect of God, holy and beloved, bowels of mercies, kindness, humbleness of mind, meekness, longsuffering; Forbearing one another, and forgiving one another, if any man have a quarrel against any: even as Christ forgave you, so also do ye.)
When Mrs. Davis became a Christian, she gave her life to Christ. This means that no matter what she did in her past, or who she was, she is no longer that person. Everything she would to do from that day forward would be to try to better herself in order to be closer to her Lord and Savior, letting His light shine through her. And, while it was her duty as a Christian to love others into the Kingdom, it is ALSO her duty not to enable sin. I'm not going to buy your drugs for you. I'm going to tell you about Jesus, and why you don't need those drugs to get you high and destroy your life. In much the same way, Mrs. Davis was not going to issue a marriage license to a same-sex couple who was intent on breaking God's law. (Leviticus 18:22 - Thou shalt not lie with mankind, as with womankind: it [is] abomination.)
If anyone wants to bring up the fact that Mrs. Davis was married 4 times, then I would suggest they read the book of John, chapter 4, about the woman at the well. If Jesus can accept HER just like she is, then why can't He accept Mrs. Davis?
Is Mrs. Davis casting judgment on same-sex couples? I think not. They are free to go to someone who believes the way they do to do as they please. She has not hated them, nor refused them life-saving help. She has simply refused to enable their sin. And, for those who wish to cast judgment on her for her past, after her sins have already been forgiven by God, Jesus has a word to say about that:
Matthew 7:1-5 - Judge not, that ye be not judged. For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again. And why beholdest thou the mote that is in thy brother's eye, but considerest not the beam that is in thine own eye? Or how wilt thou say to thy brother, Let me pull out the mote out of thine eye; and, behold, a beam is in thine own eye? Thou hypocrite, first cast out the beam out of thine own eye; and then shalt thou see clearly to cast out the mote out of thy brother's eye.
If you claim to be a Christian, you should be exalting her for her stance against the abomination of same-sex marriage, not tearing her down for making a stand in Jesus' Name because of who she once was. 1 Peter 3:8 - Finally, be ye all of one mind, having compassion one of another (as fellow Christians), love as brethren, be pitiful, be courteous. We all have a past. How would you like it if someone brought up YOUR past when they see you enter a church? After all, she took a Titus 2:11 and 12 stand (For the grace of God that bringeth salvation hath appeared to all men, Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world).