The EU’s pursuit of its green agenda and enforcement of tech rules against U.S. firms is undermining the transatlantic alliance, the U.S. deputy secretary of state warned.

“The nations of Europe cannot look to the US for their own security at the same time they affirmatively undermine the security of the US itself through the (unelected, undemocratic, and unrepresentative) EU,” Christopher Landau said on social media platform X on Saturday.

Prominent U.S. officials criticized Brussels after the European Commission slapped X with a €120 million penalty for breaching EU transparency rules earlier this week. Billionaire X owner Elon Musk, a major backer of U.S. President Donald Trump and the wider MAGA movement, threatened retaliation and called to “abolish the EU.”

Landau said the fine was only the “tip of the iceberg” and that the EU had continuously undermined its credibility with the U.S. with its focus on policies that he described in a separate post on Saturday as adverse to U.S. interests and a form of “civilizational suicide” — echoing comments directed toward the EU in Trump’s recent withering foreign policy blueprint.

“When these countries wear their NATO hats, they insist that Transatlantic cooperation is the cornerstone of our mutual security. But when these countries wear their EU hats, they pursue all sorts of agendas that are often utterly adverse to US interests and security—including censorship, economic suicide/climate fanaticism, open borders, disdain for national sovereignty/promotion of multilateral governance and taxation, support for Communist Cuba,” he posted.

“This inconsistency cannot continue,” he went on. “Either the great nations of Europe are our partners in protecting the Western civilization that we inherited from them or they are not. But we cannot pretend that we are partners while those nations allow the EU’s unelected, undemocratic, and unrepresentative bureaucracy in Brussels to pursue policies of civilizational suicide.”

Landau earlier this week slammed European NATO allies for cutting the U.S. out of the bloc’s defense buildup, as POLITICO first reported.