Jen Rubin’s meticulous and detailed analysis of the criminal status of the Hegseth order is exceptionally good. She quotes the relevant parts of international law, pulls together expert opinion of military lawyers, and demonstrates that this episode demands criminal prosecution within the system of military justice. It’s a "must read" for many reasons.
Murdering the innocent is heinous, and it puts blood on the hands of all of us. And helpless seamen clinging to wreckage are by definition "innocent". As Rubin puts the point, either a serious war crime was committed or a deliberate act of murder.
Congress, America cannot accept this lawless and evil conduct!
Affirming Democracy, Gathering Resistance 
Thank you, Dan. This is an outstanding, crisp account of the issues and should indeed be required reading. As you say, we all bear responsibility: Hegseth and our military are acting as our agents. Now it is critical to deal with it: to paraphrase Aristotle, a mark of evil is the failure to acknowledge and correct moral error.
As an addendum, here is a noteworthy article: “Just follow orders or obey the law? What US troops told us about refusing illegal commands.”