Recently, the Houthis attacked a British ship, and not for the first time. While they claim that the ships are somehow linked to Israel, they are also owned by non-Israelis, and the crew members are from various countries. So their attacks actually harm people from many different countries.
I would expect that, if a country attacks a ship that belongs to another country, the attacked country would view this as a declaration of war, retaliate and fight back.
Strangely, the reactions I see from related countries are very mild, as if it is "no big deal" that commercial ships are attacked. Why are the reactions to the Houthis' acts of war, particularly in UK, so mild?
EDIT: what I meant by "mild" is that the reactions are defensive only. For example, recently US forces have destroyed 3 Houthi boats, but this was only a defensive action, as these boats were attacking a commercial ship. There was no offensive action against the Houthis as a retaliation for their actions. Is this an appeasement policy similar to that of Neville Chamberlain?