this is a great piece of information.

There are only a limited number of options of why they are doing this.

The most mainstream is
"they feel that stability in the gulf is a higher risk than ships getting torched in the strait"

in which case, it's more unstable than people admit.

The more conspiracy minded take is
"they are protecting the jews"

In which case, things are bad because the US is losing the job of being world police