The domain is fine. My reasoning is that I know John (johnjhacking), have worked with him, have at times educated him, have on more occasions learned from him, and lastly, the attribution chain is

* twitter.com/johnjhacking refers users to

* twitter.com/sakurasamuraii, which links

* sakurasamurai.org

It's not a random group trying to defame a government. It's a known security researcher with a sterling rep.