UN Ambassador Nikki Haley just called out Iran for being a “threat to the peace and security of the entire world.”

As extra, “undeniable” evidence, she pointed to a display of Iranian-made ballistic-missile parts — proof that Iran is supplying weapons to Houthi rebels in Yemen. The exhibition included charts and photographs, supplied by Saudi Arabia, showing that the weapon had been fired at the Saudi capital of Riyadh on Nov. 4.

The United States typically classifies this kind of recovered military equipment, she said, but decided to show this trove “for a single urgent purpose: Because the Iranian regime cannot be allowed to engage in its lawless behavior any longer.”

“The point of this entire display is that only Iran makes this missile,” said Laura Seal, a Pentagon spokeswoman. “We haven’t seen this in the hands of anyone else except Iran and the Houthis.”

Tehran’s actions, Haley rightly noted, defy longstanding UN embargoes on Iranian arms exports, as well as a UN resolution passed as part of President Barack Obama’s Iran nuclear deal.

As Ralph Peters noted on these pages last month, Iran is backing the Houthis to “gain a foothold on the Arabian Peninsula.”

Critics in Europe and on the US left whined that evidence was supplied by Iran’s Saudi enemies, but so what? The basic truth is well-known: Reuters reported back in March that “Iran is sending advanced weapons” to the Houthis.

As a Middle East expert close to the White House noted, liberals “really can’t admit that the Iranians are bad actors, because that would show how insane the nuclear deal was.”