homophobic" by his gay brother after uninviting him from the wedding over his plans to wear a rainbow-colored tuxedo.But, while his sibling has been left furious over the snub, many online felt the groom was justified in excluding his brother from his big day, given the circumstances.Weddings traditions have evolved in the past few decades, with certain traditions slowly dying out, only to be replaced by new ones, but one adage remains true: never upstage the bride.For celebrity wedding planner Liz Taylor, that rule rings especially true when it comes to what guests choose to wear. "Guests should never try to upstage the bride," Taylor told the Metro. "If you are privileged enough to be invited to attend a wedding day, it's your responsibility to dress in an appropriate style and color."That's essentially the crux of the argument involving one Reddit user posting as Yrboiduck, and his brother Sam.According to the post (which has been upvoted 6,000 times, while earning over 15,000 upvotes in its comments), the groom had been looking forward to hosting Sam and his boyfriend Jack at the wedding.But that all changed a week before the big day, when Sam sent him a picture of what he was planning to wear. "It was a rainbow tuxedo," the brother wrote.