Prince William did not receive the warmest and nicest response when he arrived at an event to honor the Royal Navy’s submarine service on Friday.

The event, which was held at Westminster Abbey, recognized the 50 years of the continued commitment by the Royal Navy to peacekeeping efforts and other important matters. The Duke of Cambridge has served as Commodore-in-Chief of the submarine service for the past 13 years.

While there, the dad of three gave a reading from the Bible. John Hall, the dean of Westminster, shared his prayers to those who attended the service.

“We pray that the Royal Navy may never be required to deploy these terrible forces in war and that they may continue to deter their use by others,” he said, via People.

But outside Westminster Abbey, hundreds of protesters gathered to denounce the service. According to The Telegraph, members of the Campaign for Nuclear Disarmament (CND) chanted shame on you when they saw Prince William arriving alongside Penny Mordaunt.

Some of the protesters laid on the ground acting as if they were dead to remember the nuclear war victims. Activist Omar Ahmed told BBC that he was surprised to see Prince William supporting something that could destroy the planet.

Hall also acknowledged the fact that he had been asked by a lot of people to cancel the service. But the dean clarified that the service was not intended as a celebration of nuclear power because it is not right to celebrate weapons of mass destruction.

“We do owe a debt of gratitude to those responsible for maintaining the peace,” he said.

But Kate Hudson, the secretary general of the Campaign for Nuclear Disarmament condemned the event and called it morally repugnant. She also said that the recent service sends out a terrible message to the world about their country.

For Hudson, the event that Prince William attended sent out the clear message that weapons are celebrated in Britain and in a place of worship.