I understand that you would wish for us to attend the ceremony planned for next April. However, asking us to attend puts us in a direct conflict of our values. As you must know, based upon your upbringing, education and communications we have had in the past, we are very committed to an orthodox Jewish lifestyle. I've even completed three parts of a "smicha" program, most recently receiving a rabbinical certificate this past January at the Yerushalayim Kotel concentrating on Jewish marriage laws. Unfortunately, as much as you say you love B, and I believe you do, Jewish law does not recognize a marriage between a Jewish person and a person of another faith.
Our attendance at such an event would be at the least a meaningless gesture and, at worst, might somehow convey the false impression that we recognize or sanction this arrangement.
Our hearts and home will always be open to you. You are always welcome and I hope you continue to maintain your relationship with us. If anything, we continue to hope that, as time passes, we will continue to foster an even closer relationship. We are not rejecting you as a person. However, with all due love and respect, we must decline your invitation to attend the planned April ceremony.
Abandoning Eden's parents are in a difficult position, because, as her father notes, they have a conflict between their love for their daughter and their religious values. However, to choose their religious beliefs over their child's happiness reflects a complete lack of humility about their belief system. If we could only convince them and others like them that their religious values are based on outdated myths and stories which are just not true, this sort of tragedy wouldn't happen.
(Previously: How Orthodoxy Causes Good Men to Do Evil, Intermarriage and Interdating Part I, Part II)