Yes, Christianity came from Judaism, but Christian marriage came from Roman marriage. There was no Christian marriage rite copied or adapted from the Jewish rite. Indeed within the Empire the Church had no specific rite for marriage until the 9th century (again I don't know what the Latins outside the Empire did about this). Until then Christian marriages were as I described them: Roman civil marriages undertaken with the blessing of the bishop.
Christ's reference to marriage is not bounded or conditioned on the Jewish notion either--Jews were permitted both multiple wives and concubines, while Roman marriages were monogamous, albeit with the defect of concubinage as in institution--rather Christ refers to the natural institution in its ideal form.
Nor is there any point in separating 'Roman Catholic' from Christian here: I am discussing the state of Christian marriage before even the schism of the Nestorians from the Church, and even the institution of the 'rite of crowning' and the transfer of the registration of marriages to the Church took place before the schism of the Roman patriarchate from the Church.
Christian marriage came from Judaism - - Adam and Eve. The Bible says so...
Marriage was long established in Judaism before Rome ever existed. Rome is not the center of Christianity - - Yeshua was born into the House of David.
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Christ refers to the natural institution in its ideal form.
No, he was referring to Genesis 1:18, Yahweh and Yeshua are one in the same...