Some questions to think about:
God hates divorce. Are there some things He hates worse?
Do you know the first divorce that was mentioned in the Bible?
Did you know there were times that God REQUIRED people to divorce?
If adultery is an exception for divorce, then why did Paul not mention anything about it in 1 Cor. 7 ?
If Jesus gives an exception only for marital unfaithfulness, and Paul gives an exception only for desertion, then are they contradicting each other?
If they aren't contradicting each other, but they are simply stating general concepts to make a point, but they all assume their audiences understand that exceptions are implied, then how many exceptions are there?
If there might be other exceptions, how far can they go? Abuse? Sexual abuse only? Or physical abuse? What about mental cruelty? What about the unwillingness of a partner to be intimate with their mate? What about neglect? What about emotional neglect? How far can you wander down the path of exceptions before it becomes such a wide basket of exceptions that the rules don't really mean anything anymore?
If Jesus was understood by his followers as having exceptions implied when he was quoted in Mark, then why did His disciples have such a wild reaction to what He said?
If Jesus was saying that remarrying was an act of adultery, rather than entering into a continuing condition of adultery that needed to be repented of, then why did everyone in the first five centuries of the church, who spoke the koine greek the new testament was written in, all get it wrong and think he meant an ongoing state of adultery, when we, as 21st century english speakers can see so clearly that He merely meant an act of adultery?
If the remarriage is only a single act of adultery (as Voddie Baucham would say), then when does the adultery occur? Is the making of the new covenant on the afternoon of the wedding the act of adultery? Or is the consummation of the new marriage on the evening of the wedding the act of adultery? If they really are husband and wife in Jesus' eyes, then why is it adultery? When does it cease to be an act of adultery? Is it a sudden end (perhaps during the consummation of the new marriage) or is it something that "gradually becomes non-adulterous"?
If the proper response after remarrying is to stay in the new marriage even though it is adulterous (as John Piper would say) then where is there any other precedent or parallel in the bible that says you shouldn't have started a lifestyle of sin, but now that you've started it, you need to keep doing it forever?
If Deuteronomy 24 is a commandment that if you've divorced and remarried, no matter the reason, then you can't ever go back and remarry the first spouse because it made her to be defiled, then what was it that defiled the woman so that they could never remarry? Was it the fact that she had sex with another man? Does Hosea line up with that? Was it because there was a new marriage vow formed? Does king David line up with that (2 Sam 3:12-15)? Does GOD even line up with that (Jer. 3)?
Just some questions to think about. Your opinions are welcome...