I don't claim to contradict that he is against the concept of cryptocurrencies or blockchain in general, but I fail to find evidence that he is against the technology in general.
I do find evidence he is opposed to Bitcoin in specific, or at least warns against it.
Could you point me to English writings where he argues against blockchain/cryptocurrency in general?
Here's his primary English writing on Bitcoin and cryptocurrency in general (not necessarily blockchain), sent to the SEC: https://www.sec.gov/comments/sr-batsbzx-2016-30/batsbzx20163...
This critique of Bitcoin is quite short, and seems directed at Bitcoin in particular, in no way do I conclude that he is against the concepts of blockchain (say non-currency), or perhaps even cryptocurrencies that do not take on some of the Ponzi aspects.
After reading this I can perfectly imagine (but do not claim so) that he might support certain other forms of blockchains and/or cryptocurrency...
https://www.reddit.com/user/jstolfi
He primarily posts in buttcoin, a sub that exists to mock bitcoiners. It's pretty fair to say he thinks all coins are crap, not just bitcoin.
Also, please include me in the "Understands cryptocurrencies and yet doesn't support it" bucket please :)