I know, Jesus is the sex police. For people like you, it doesn’t matter if he’s speaking to Jewish people, before the Crucifixion, etc. What matters is the sex rules—as covenantal requirements!! Necessary for salvation.
Indeed, they are permission to live. Adultery is a capital crime in Jewish law, so you’re asserting that Jesus is calling for the death penalty to be enforced upon divorcees.
And not even Jewish, but you’re somehow extending this to Gentile people. Since divorce was legal and common in ancient Rome, Jesus’ slaughter of divorced people was presumably extensive?
Or we could look at Matthew 19:9 in its context.
I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery.
We’d remember that porneia (“sexual immorality”) is an extremely rare word that might mean something like ‘prostitution’, but its meaning (as I discuss here) isn’t clear.
We might also recall that polygamy is perfectly legal in Jewish law. If Jesus is speaking to people about the (new) problem of divorce-and-remarriage, then the obvious solution is simply to marry multiple women.