All in

The US has carried out fresh strikes on Yemen, a day after a first raid triggered mass protests in the country’s capital and other Middle Eastern countries voiced concern that the attacks could trigger further unrest in the region.

[...]

Earlier on Friday, the director of the US joint staff, Lieut Gen Douglas Sims, told journalists the Houthis had launched an anti-ship ballistic missile in retaliation for Thursday night’s strikes but it had not hit a vessel.

“All American-British interests have become legitimate targets” for the Houthis following the strikes, the rebels’ Supreme Political Council said, while Hussein al-Ezzi, the rebels’ deputy foreign minister, said the US and Britain must “prepare to pay a heavy price”.

  Guardian

American-British interests are sacrosanct.

The UK and US defended [their earlier] attacks, which marked a major escalation of the crisis in the Middle East triggered by the Israel-Gaza war, but leaders in the region condemned them for inflaming tensions in an already volatile climate.

[...]

The bombing was justified because the Houthis were deterring merchant shipping from using the busy international waterway,[tThe UK prime minister, Rishi] Sunak said. “People can’t act like this with impunity and that’s why together with allies we’ve decided to take this action,” he said.

[...]

The US on Friday said that 28 locations had been hit in the initial strikes, using more than 150 munitions, while Britain’s Royal Air Force bombed two, a sweeping bombing campaign intended to halt a spate of Houthi attacks on shipping in the southern Red Sea that has disrupted world trade and threatened to push up inflation.

And in an election year!

In a letter to congress, president Joe Biden said that he ordered the strikes to protect US personnel, and disrupt the Houthis’ ability to carry out future attacks in the Red Sea.

Sure. That's why.

The White House national security spokesperson, John Kirby, told MSNBC [...] “We’re not looking for conflict with Iran. We’re not looking to escalate and there’s no reason for it to escalate beyond what happened over the last few days,” he said.

No reason other than Iran is supporting the Houthis who are supporting the Palestinians in Gaza against Israel.

Many of the [Houthi's Red Sea attacks] have been directed at merchant ships without Israeli links, prompting the US and a coalition of allies to dispatch warships to the Red Sea to protect shipping lanes, see off raiding boats and shoot down missiles and drones when necessary.

The White House said Biden had decided to bomb targets in Yemen on Tuesday, shortly after the Houthis attacked a fleet of US and UK warships with 18 drones and three missiles. Once that attack was repelled, the US president directed the country’s military to respond, and Sunak decided to join in soon.

[...]

No other country was prepared to participate in the US-UK bombing, although it received help from Australia, Bahrain, Canada and the Netherlands. Denmark, Germany, New Zealand and South Korea signed a statement in support of the action, and France said the Houthis were to blame for the escalation.

[...]

The UK defence secretary, Grant Shapps, also said that Iran could de-escalate tensions. Asked his message to Tehran in an interview with the Telegraph, he said: “You must get the Houthi rebels, others who are acting as proxies for you, Lebanese Hezbollah are obvious examples, [and] some in Iraq and Syria, you must get these different organisations to cease and desist because we are, the world is, running out of patience.”

Arrogant much?

Aid agencies said they were alarmed by the prospect of further fighting in a country just emerging from a nine-year civil war and called for de-escalation. An Oxfam spokesperson said: “The humanitarian situation in Yemen remains dire with almost 21 million people in desperate need of food, water and life-saving aid. It is vital that peace is restored and further suffering prevented.”

It's obvious from the US support of Israel's genocide in Gaza that we don't give a rat's ass about suffering.

Multi-national.  US and Great Britain.

...but hey, do what you want...you will anyway.