In his monologue, Greg Gutfeld criticized thousands of marchers in Brussels, Belgium who were protesting President Trump's appearance at NATO headquarters.

"I guess they forgot [Trump] wasn't the one who just butchered those little girls," Gutfeld said, noting they did not march against the latest terror attack in the U.K.

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"If they want to live with terror while bravely marching against a 70-year-old law-abiding politician, then let them fester in defeat and moral squalor," he said.

Gutfeld also noted how Trump was criticized for appearing to shove Montenegrin Prime Minister Dusko Markovic, in order to stand near the front of the group of world leaders.

In that way, Gutfeld said Trump "shoved cowardly platitudes to the side" during his speech to 50 Muslim nations prior to his NATO visit.

"This is a battle between barbaric criminals... and decent people," Trump said in Riyadh.

Watch Gutfeld's full monologue above.

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