With regard to marriage, "Everybody's doing it" is not an acceptable reason to abandon the JudeoChristian standard of marriage.
No offense to you and your choice of marrying out of your religion, but in every war there is collateral damage, and some children will never be reconciled to their parents' point of view. But parents who truly believe in their Jewish or Christian religion should not cave in to behaviors they do not want in their own household. "As for me and my house, we will serve the Lord." (Joshua 24:15)
Sorry, but absolutism will never change someone’s heart. Shunning and excommunication may have once worked in small closed societies where the person choosing a different path could be bullied with the prospect of being alone and without group protection. The world is different today. Name your most previously forbidden behavior and there are support communities eager to embrace the prodigal, providing a sanctioned substitute.
Friends and family may refuse acceptance and then find that they are the ones now isolated from the general society. Prevalent culture is predominate.
I am not arguing which POV is right. That, too, is relative. I am observing a reality I have lived and which I see everywhere. Amish, Jewish, Christian cultures are today marginalized by an overwhelming culture imperative where traditionalists are still free to believe whatever they desire as long as they do not act against the overarching secular culture. The State seemingly has the support of a majority to apply negative sanctions against tradition.
We have abandoned black and white values for the rainbow and the gray scale. It may be our downfall, but that is simply how the world is presently organized. Coerced values are not values at all. They are simply perceived as jack-booted thuggery and the general society will close ranks against them.
I’ve known martyrs. They can be as unpleasant to be around as the most profligate rebel. Quoting religious texts to the unbelievers is as profitable as trying to teach pigs to sing. There are cultures, such as Islam,that prescribe torture and death for anyone breaking their commandments. Even that does not work with everyone.
We once believed values could not be legislated and yet, the secular culture has legislated theirs, to great effect. Castigate parents who choose to have a relationship with their child, regardless of lifestyle, if you wish. Those families are faced with choices most of us would not want to make. If blame must be placed, then a case could be made for the traditional values failing to offer attractive alternatives. If it is to be “My way or the highway”, one must be prepared for the hard road of rejection.