British Veteran and XR member Donald Bell, 64, who led the protest at Whitehall, central London, at 8am local time, reportedly held a two-minute silence before laying a wreath and unfurling a banner with the message “climate change means war, act now.”

“I took action today knowing that I would be criticised. I knew that I would be accused of being disrespectful and hated by many for speaking out in this way,” Bell said, in anticipation of massive backlash amid somber Remembrance Day observances.

“Unchecked climate change means a return to a world at war. I cannot stand by and let that happen. It is my duty to act.”

It didn’t take long for the nation’s ire to spill over on social media, with some branding Bell, who completed four tours in Northern Ireland, and the protest as a “national disgrace," and a “slap in the face to all veterans.”

Many argued that, while clearly chosen to elicit strong responses, Remembrance Day is not the time, and the Cenotaph is not the place for such climate activism. Some even questioned whether people in XR’s leadership are plants, actively working to discredit the organization and turn the public against it.

In contrast, others argued that the protest appeared sufficiently respectful and thought-out.

The eco warrior group said in an online statement that the protest was designed to highlight the parallels between rising global temperatures and an increase in armed conflict, citing research commissioned by the Ministry of Defence (MOD).

In a June report, the MOD concluded that “climate change may aggravate existing threats to international peace and security.”