I have no idea what the Jikes RVM has to do with "ideology". The point is that you're trying to tell someone who has a significant academic and industrial PL pedigree that they don't know what an expressive language is.
You seem to have an intense dislike of JavaScript. I'll the first one to admit that JavaScript has a lot of problems. But not being expressive enough is not one of them. JS is, if anything, too dynamic and expressive.
Yes, if he thinks that JS is expressive he does not know what is expressive. And his track record clearly lacks anything related to any expressive language. I can only explain it with an ideology, because ignorance is not an option here.
And, no, JS is not expressive. It got strict limits on an available level of abstraction (unless you go into eval, of course).