In a news report about an individual crime?

Lets say a hate crime was committed against Jews. Do you assume it was a Nazi, or an Islamist? This pops up all the time in Europe, usually it is Islamists but sometimes it is Nazis, and that makes a huge difference when interpreting what the crime means.

Or for this case, lets say the perpetrator was of Chinese origin instead of Japanese. Do you think that wouldn't be relevant at all?

If the person was Chinese yes that would be an important consideration wrt the motive