The specific attack they were talking about involved 126.9 million network requests per second, over a sustained period of time, and it was a widespread attack where the source was millions of individual computers, suspected to be regular desktop PCs from (or adjacent to) China. In other words the attack involved malware that was rapidly installed on vast numbers of computers at the same time.

Due to the massive size of the attack, it was investigated thoroughly and the only sensible conclusion was that it was state sponsored. Specifically China likely to have used their widespread censorship tools to install malware that quietly attacked Github, likely without the owner of the PC from even knowing it had happened (the attack wasn't serious enough to disrupt the infected PC)..

That's not "hating Chinese" it's just pointing out a simple fact. Some DDoS attacks are state sponsored. And only a small number of states gate involved in such attacks.