Do you have a fact source or just vague associations? The statement at question is "Most of the ships they target are either own fully or partially by Israeli companies, or are headed to Israeli ports"
From source Wikipedia, this is not true. Only 3 of 17 have Israeli ownership or ports of call. Do you have a source for Israeli ownership or ports of call for 6 more ships?
Also, your stated class of "owned by Israel-supporting billionaires" is moving the goalposts. That is not the announced Houthi criteria.