I admit my formal studies are decades past.
Why trace the biblical history of marriage if it is ignored? Nothing you said addressed the issue of the history of marriage in the Bible, outside of what Jesus said, which is one data point.
Did Moses, in passing on the law that he claimed to have received for God for the people of Israel, truly pass on a law that he had received from God? Was that law gravely immoral?
A similar question could be asked of Nathan. Was he a prophet of God? Did he speak for God when he told David his sin was forgiven, even though David did not ever separate from Bathsheba?
It almost sound like you are saying Moses gave the law to the people of Israel *contrary *to the will of God, like some rogue prophet, Mohammed, Jim Jones, etc.
First of all, Moses didn’t command–he permitted.
Jesus replied, “Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning. I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery.” Matthew 19:8-9
Second of all, It is not I, but Catholic Answers who provided that answer.
As the article says, a Catholic believes that “this was part of Jesus’ fulfillment of the Old Law.”
Moses’ law was valid for the people of Israel, but from a Catholic theological standpoint, Jesus is the fulfillment of the Law.
Old Testament law, as such, is not binding on Christians. It never has been. In fact, it was only ever binding on those to whom it was delivered—the Jews (Israelites). That said, some of that law contains elements of a law that is binding on all people of every place and time. Jesus and Paul provide evidence of this in the New Testament.
catholic.com/magazine/print-edition/why-we-are-not-bound-by-everything-in-the-old-law
Likewise, the new Covenant began at a passover meal, a very special passover meal we refer to as the Last Supper. Jesus becoming the unblemished sacrifice that provides the
nourishment of the meal, and spilling His blood so that no longer would it be necessary for animals to be sacrificed to renew the covenant.
saintlukeslidell.org/news/old-versus-new-covenant
With the coming of Jesus, the story of God’s covenant plan reaches its conclusion.
Jesus “fulfills” the promises of each of the five covenants we have been studying in this course - the covenants with Adam, Noah, Abraham, Moses and David…
In telling His Apostles to “do this in memory of Me” (see Luke 22:19), Jesus was instituting the Eucharist as a “memorial” of a new “passing over” and a new covenant.
We who believe in Jesus are to remember our salvation in a ritual meal - just as the Israelites commemorated their salvation from Egypt.
stpaulcenter.com/studies/lesson/lesson-six-the-new-and-everlasting-covenant
As noted in the text, divorce was already allowed in some circumstance(s), though there was disagreement in this matter within Judaism as to grounds for divorce. The more conservative approach interpreted Moses to allow divorce ONLY for adultery (porneia), whereas a more liberal approach allowed a man to divorce his wife for any reason. Some commentators suggest that the test or trap of the Pharisees was to get Jesus to take a position, thereby alienating at least some Jews while siding with others.
But Jesus avoids this trap and gives a new teaching. No longer can there be divorce and remarriage as previously allowed because of the sinful condition of man. If Jesus had allowed divorce and remarriage for adultery, He would have been simply repeating the conservative understanding of Moses. But clearly this was not the case, for look at the response of the disciples: “If such is the case, then better not to marry.” In other words, Jesus had gone far beyond what had been allowed, so that marriage was truly binding until death. And while we can debate this seeming exception, clearly it does not allow for what we would describe as sacramental divorce and subsequent remarriage, even in the case of adultery. And quite frankly, for many Christians who might want to argue this case because of a marriage gone bad, adultery is often (though certainly not always) a symptom of a marriage gone bad long before one or both partners acted out upon marital infidelity.
ewtn.com/v/experts/showmessage_print.asp?number=346885&language=en