Matt 5:32But I say unto you, That whosoever shall put away his wife, saving for the cause of fornication, causeth her to commit adultery: and whosoever shall marry her that is divorced committeth adultery.
Matt 19:9And I say unto you, Whosoever shall put away his wife, except it be for fornication, and shall marry another, committeth adultery: and whoso marrieth her which is put away doth commit adultery.
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The teachings of Christ are CRYSTAL CLEAR
Remarry is allowed if divorce is due to fornication.
If someone does not understand those verses then everything else they Bible claim/interpret is to be taken very lightly indeed