You Tube posted on 4 June 2024 a two-minute video titled "Danger in the Red Sea: Who Shall the Houthis Let Pass?" by Peter Zeihan.
The author identified three categories of ships that the Houthis try to avoid attacking:
--oil tankers because they usually sail from Arab countries or Iran and the Houthis depend on these countries for financial assistance;
--grain ships from the Black Sea because they usually have Russian connections and Moscow is a Houthi supporter; and
--Chinese-flagged container ships because China agreed to pay the Houthis protection money.