The attacks are broadly a blatant attempt to start another Iraq War 2, which is disgusting on the face of it.
In specific though, the thing that makes it a fact that Pete Hegseth is a murderer is at least some of these strikes hit a powerboat once with a missile and then after survivors were clinging to wreckage and flailing in the water Pete Hegseth ordered a second strike to kill the survivors who were now helpless and in need of emergency rescue.
This is considered by most militaries and societies the world over as a warcrime/murder because it is.