I think it's a question of whether you're using "capitalist" as a shorthand for "people who profit from the investment of capital" or "people who assert ideologically that an economic system in which market actors trade as freely as possible is the most beneficial system to society as a whole."

The varying reactions to this interview are interesting to me in how they reveal people think about the market. I'm seeing a lot of pushback along the line of "So what? Most of what he says is true!" I think people's negative reaction is a result of a decade or more of an ideological push to get ordinary people's savings into the stock market, and, furthermore, to portray the people who are active drivers in those markets as job-creating heroes who know better than some government bureaucrat and who therefore deserve their high compensation. When it's revealed that at least one such marketeer dreams of profiting from a general economic collapse, that seems to invalidate the promises of an ideology that is often described in shorthand as "pro-market" or "pro-capitalism".