U.S. Secretary of State Mike Pompeo dismissed the Houthi claim that the Yemeni rebel group had carried out Saturday’s strike on two huge Saudi Arabian oil processing facilities. There was “no evidence” that the drones belonged to the Houthis, he said. Instead, he blamed Iran.

No surprise there. The way things are at the moment, if an incoming asteroid were about to strike the Earth, the United States would blame Iran. But there’s “no evidence” that the drones came from Iran either. Pompeo is simply trading on the assumption that Yemenis are too ignorant to manage that sort of technology, so it must be Iran.

Saudi Arabia and the alliance of other autocratic Arab States that have been bombing Yemen since 2015 push the same line all the time. It goes down fairly well in the kingdom, where most people look down on Yemenis for being poor and less well educated, but it isn’t actually true.

Within a year of the war’s start, the Yemenis began launching a few small ballistic missiles (with conventional warheads) back at Saudi Arabia, but the Saudis refused to believe they were doing it themselves. The Houthis, they implied, were too backward to upgrade the Yemeni air force’s old Soviet-made Scud missiles themselves. Iran must have helped them.

In fact, the Yemeni Air Force had Scud missiles for decades before the government collapsed in 2015, and technicians to service them. Some, maybe most of those technicians threw in their lot with the Houthis, and upgraded those Scuds by cutting them in half and inserting a larger fuel tank in the middle.

It changed their flight characteristic and made them very inaccurate, but it did extend their range enough to hit targets all over southern and eastern Saudi Arabia. And by mid-2017 the Houthis, who controlled most of Yemen, were making their own improved copies known as Burkan missiles.

The “Super-Scuds’ were more a morale booster than a war-winner for the Houthis, who live under a merciless daily bombardment from the air (7,290 documented civilian deaths so far). The current attacks on the Saudi oil facilities, if the Houthis’ claim is true, would just be another morale-booster, even though it has temporarily cut world oil production by around 5 percent.

But was it really the Houthis? At this point there is no clear evidence either way, but it could have been. They certainly have the motive, and they may have the technology. They have used small drones in previous air strikes, and there are bigger drones available commercially that could do the damage seen at the Saudi facilities.

The biggest currently available is the Guardian, a monster that can carry a payload of 200 kg. It’s made by Griff Aviation, a Norwegian company whose Lakeland factory in Florida is producing one Guardian a day and selling them to industrial, agricultural and military clients.

It would be quite a trick for the Houthis to acquire 10 of them (which is how many drones they say they used in their attack), but stranger things have happened. Or maybe they did get their hands on some military drones, which would certainly be up to the job. Or maybe it was Iran, but nobody really knows yet.

One apparent flaw in the Houthi theory is that there are no civilian drones capable of flying the almost 800 km from Yemen to the Saudi targets, but that’s not really necessary. Most of the land around the Abqaiq and Khurais oil facilities is open desert, and launching the drones for 25 to 50 km away would escape detection unless the Saudis were actively anticipating such an attack.

Who would launch them? There are a million Yemenis resident in Saudi Arabia, plus 2 million to 3 million Saudi citizens who suffer severe discrimination because they follow the Shiite version of Islam. There are even Sunni Saudi citizens (mostly Islamists) who are sufficiently disaffected to attack the regime directly.

That’s a pretty large pool to fish in if you’re looking for local collaborators to smuggle the drones in and launch them — which is what the Houthis themselves say happened. In their statement claiming credit for the attacks, they express thanks for “co-operation with the honorable people inside the kingdom.”

None of this proves that it was the Houthis or that it wasn’t the Iranians. It does leave the identity of the attackers up in the air, where it will remain until conclusive proof emerges one way or another (if it ever does). Pompeo’s confident attribution of blame to Iran, later echoed by U.S. Energy Secretary Rick Perry, is just politics, not proof.

As Iran’s Foreign Minister Javad Zarif tweeted on Sunday, “having failed at max pressure (anti-Iran trade sanctions), Sec Pompeo’s turning to max deceit.” Fair comment, really. And we should be grateful that U.S. President Donald Trump, for all his faults, is the grown-up in the house this time.

On Sunday Trump tweeted: “There is reason to believe that we know the culprit, are locked and loaded depending on verification, but are waiting to hear from the Kingdom as to who they believe was the cause of attack, and under what terms we would proceed!”

Trump doesn’t want a full-scale war with Iran, and neither does Saudi Arabia. It probably won’t happen.

Gwynne Dyer is a Canadian author, military historian and independent journalist based in London. His lastest book is “Growing Pains: The Future of Democracy (and Work).”