Orca rage?

I’m skeptical that the orcas off the Iberian peninsula have rational motive in attacking small yachts. I doubt, also, that they are acting from grief or rage. As Jacob Stern puts it:

Projection and anthropomorphization are only shortcuts to a shallow sympathy. Orcas really are capable of intense grief; they are also capable of tormenting seal pups as a hobby. They are intelligent, emotionally complex creatures. But they are not us.

I’ve seen nonsense hoping those orcas go after the yachts of the very rich. What those writers miss is that all of the boats attacked so far have been relatively small. The largest I’ve heard was a 50′ charter yacht. About the size of whales. And all have been sailboats. None have been the floating palaces that billionaires build.