The criticism was very unprofessional, posting it in the general thread where every guys who knows nothing about technical details lingers. If he has something to address why he didn't addressed it directly into the dev, because there is a $350k rewards if he really proved something is very wrong about Rai. This is a complete FUD.
You can don't agree, but is correct to give opinion about possible dangerous flaws.
Also, maybe someone don't care about 350K $ reward. Money isn't all. Also, probably, that guy posted the so called "FUD", guess the flaw isn't fixable.