A man dressed like an ICE agent got his butt whooped by a bunch of people at a No Kings protest in Hawaii ... and it's all on video. The epic beatdown was given out over the weekend in Waikiki ... it all started when one of the protesters threw some liquid on a guy outfitted like an Immigration Enforcement Officer, and things quickly got violent. Ya gotta see the video ... multiple people take the guy down to the ground and they wail on him with fists and feet ... including one woman who kicks