Trump has angered many foreign diplomats, with officials from Europe, the Middle East, Latin America, and Asia reportedly making private complaints about some of the candidate’s comments, Reuters reported. US officials said that it was highly unusual for diplomats to comment on US presidential candidates—as they’re mindful they’ll have to work with whoever wins.

That said, a number of world leaders have not held back when it comes to Trump. British prime minister David Cameron described Trump’s anti-Muslim rhetoric as “divisive, stupid, and wrong,” while French prime minister Manuel Valls criticized Trump for encouraging hatred against Muslims.

Valls tweeted: “Mr. Trump, like others, stokes hatred: our ONLY enemy is radical Islamism.” The Turkish president and a Saudi prince also denounced the Republican presidential frontrunner, with the latter tweeting describing Trump as “a disgrace.”

No wonder Kerry is embarrassed.

📬 Sign up for the Daily Brief

Our free, fast, and fun briefing on the global economy, delivered every weekday morning.