I agree with you here. I accept this as a valid explanation regarding how the husband causes the wife to commit adultery.Adultery still means adultery still means what it always meant to Hebrew speakers. Christ isn't giving a new definition of adultery but is making a similar point as in Matthew 5:21-22 - it is the heart that matters. An unjustly put away wife is tempted to adultery because of what the husband does and it was his hate (Malachi 2:16) that led him to it. He can't wash his hands of her guilt.
So far this only speaks to Matthew 5:31-32 but my question is on other relevant passages that do bring up the husband being condemned for reasons that's in addition to causing his wife to commit adultery.Those two verses aren't the only instance of this teaching of Christ's, it was part of his early message (Matthew 5:31-32)...
"It has also been said, ‘Whoever divorces his wife must give her a certificate of divorce. But I tell you that anyone who divorces his wife, except for sexual immorality, brings adultery upon her. And whoever marries a divorced woman commits adultery."
See here the same core message as in Matthew 19/Mark 10. Notice the clear intent of this teaching. Notice a total lack of new definition of adultery or condemnation of polygamy. Notice the guilty husband need not remarry to be condemned. He wasn't redefining adultery, he was expanding the blame, he was clarifying valid grounds for divorce (a matter of longstanding debate).
I want to know how or why that's adultery or really, how that adulterous act (divorce+remarriage) is identical to OT adultery ( a husband sleeping with another man's wife).
I accept that Jesus was trying to prevent serial monogamy. Even Catholics agree with this although they take it a step further to say that all Godly marriages are for a lifetime.. only death can separate the two spouses.The act of adultery here is still the same as in the OT: a married woman having sex with someone not her husband. Nothing in this passage extends that to men. A never divorcing man adding a second or third wife is no where condemned for adultery.
Matthew 5 is clear a husband need not remarry to incur guilt, so why was it mentioned later in Matthew 19? The answer is as obvious to us as it likely was to them: men were divorcing to trade up. Serial monogamy.
There is a cultural context to this. Jesus taught during a time of conflict between traditionalist Jews and Hellenistic Jews who had taken on Greek culture. What we see here isn't a condemnation of polygamy but the very opposite, a condemnation of the Greek way of marriage. If you can add a second, you need not dispose of the first. But Greek culture only allowed 1 wife.
That is the true source of the rule of monogamy in the western church; the influence of the worldly ways of the Greeks and their false moralities. The modern church condemns polygamy while excusing divorce. They are taking the side of the Greeks against Christ and the Hebrews. God had the opposite concern:
Since you reference Matthew 19, I presume that you agree that the husband does incur guilt when a remarriage is involved, that guilty act is called "adultery". But then you claim this is compatible to OT adultery and this is where I begin to disagree. Where does the man sleep with another man's wife in Matthew 19:9 or Mark 10:11-12? If you can't point that out, then you can't claim that it's the same as OT adultery.
But you do agree a that the man is being called an "adulterer" for remarrying, right?