(CNN) A friend of Meghan, the Duchess of Sussex, has defended Prince Harry's wife in a post on Instagram, calling out the "racist bullies" who criticize her, following years of "undeserved hate and abuse."

Earlier this week, environmental campaigners accused the Duke and Duchess of Sussex of hypocrisy after the couple used private jets to fly to the south of France and Ibiza in two trips just days apart.

British and international media covered the story extensively, and the duchess' behavior is routinely criticized by British media outlets.

"When someone faces unfair criticism, you call it out. When that person is your friend and your family, you call those critics what they truly are. Shame on you, you racist bullies," Jessica Mulroney, a well-known Canadian stylist, posted online. Mulroney's children were in the bridal party for Harry and Meghan's 2018 wedding.

Although Mulroney didn't mention Meghan by name, she captioned the post "3 years of undeserved hate and abuse. It's enough."