Houthis have apparently lobbed "missiles" from Yemen to.... Israel. Starting to get interesting. That will answer the question on the Bab-al-Mandab being messed with.
There goes the neighbourhood.
Yemen's issues now become existential threats to KSA for certain, horn of Africa as well, and even, once again, to Oman, just like the good ol' days. Closure of the Red Sea impacts Europe, North Africa, Asia, North Asia... pretty much everyone other than Brazil and points south...
The great orator in the WH might need to have a new voice that is coherent to achieve any measure of alliance to go and pull the goat out of the stew and put it back together again. Taking out the Red Sea as an MSR is going to cause mayhem to many, more than just the gulf does.
It is probably a long shot to suggest that the WH read some of their own history when the voice goes off on Europe never supporting the USA's wars, seems that there was once this thing called 9/11, and NATO and other non NATO countries responded to support the US when Article 5 was invoked, for the only occasion since the inception of NATO. More Danish forces per capita were sent to Iraq and Afghanistan than the US did, which is not apparent in the rhetoric that vents from the WH. At the beginning of WW-2.0, the USA did not support the UK, until eventually FDR assisted through Lend-Lease, which happened to more or less bankrupt the UK later. The US entered the war when attacked by Japan, (against Japan) and then Hitler apparently channelling future presidents, declared war against the USA. Going back further, in WW-1.0, the US was late to the party, but was instrumental to the outcome, the same is true of WW-2. Mr T's bestie friend, Vlad, wants a return to the good ol' days of being Tzar, (seems to be a lot of that going around lately) and that overlooks that WW-2 got its kick off whistle due to the actions of the USSR planning to invade in coordination with Hitler, the state of Poland, while carving up more of Europe to Stalins benefit. Today, Vlad has been happily giving targeting info to Iran and presumably the Houthi's, while being graciously having sanctions removed from their oil supplies.
Reminds me of the opening lines to "Soap"... "Confused? You should be...".
India, China, Japan, and even South Korea will have great interest in what now happens, this is a direct threat to their own stability.
Regime change is on the way, the question is, in what countries.