You Are Invited to Witness This Important Event. and to Attend Just the Reception Based on Differing Religious Views Would Be Rude, Unless an Unforeseen Reason...
You are invited to witness this important event. And to attend just the reception based on differing religious views would be rude, unless an unforeseen reason came up, such as an emergency of some kind. If that is the case, a brief explanation of why you missed the ceremony would be in order.
Is it rude to skip a wedding?
"While you should never feel obligated to attend a wedding you don't want to be a part of, think carefully if the reason you are using will hold up years later when you look back on it," Gottsman says. Once you decide to decline, you should ideally share the news in person, not through the mail.
If they are, and you are not vaccinated for one reason or another and don't plan on doing so before the wedding date, Maryanne Parker, etiquette expert and founder of Manor of Manners, says it is perfectly acceptable to RSVP “no” to the wedding.