Nigel Farage, one of President Trump’s closest allies in the United Kingdom, says the U.S. missile strike in Syria this week may concern Trump's supporters.

"Where will it end?" the former U.K. Independent Party (UKIP) party leader tweeted of the "military intervention."

Many Trump voters will be worried about this military intervention. Where will it end? — Nigel Farage (@Nigel_Farage) April 7, 2017

Trump’s swift response to reported chemical weapons use in Syria alienated some of the president’s staunchest supporters in right-wing media.

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“Those who wanted us meddling in the Middle East voted for other candidates,” conservative commentator Ann Coulter tweeted Friday.

“There comes a day in every child’s life when his Daddy bitterly disappoints him,” former Breitbart News editor Milo Yiannopoulos wrote in a Facebook post.

Thursday’s strike was the first direct American assault on the Assad government and the most significant military action of Trump’s presidency so far.

The U.S. fired dozens of missiles into Syria late Thursday in response to a chemical attack that left scores dead, including women and children. The U.S. has blamed forces loyal to Syrian President Bashar Assad for the gas attack.

Trump said he was moved to action upon hearing of the harm caused by the chemical attack, which killed more than 70 people, including over 20 children. The U.S. strike targeted an airfield near the Syrian city of Homs, the reported origin of Tuesday’s deadly gas attack.

“Assad choked out the lives of helpless men, women and children,” Trump said at his Mar-a-Largo resort in Palm Beach, Fla., where he was hosting Chinese President Xi Jinping. "Even beautiful babies were cruelly murdered in this very barbaric attack. No child of God should ever suffer such horror.”

Trump repeatedly warned against U.S. military intervention in Syria before this week despite frequently criticizing former President Obama’s avoidance of entering the civil war there.

“President Obama, do not attack Syria,” he tweeted during one instance in 2013. "There is no upside and tremendous downside. Save your ‘powder’ for another (and more important) day!”