Race and ethnicity are different things. So like, Zimmerman is white (that's his race) and he's Hispanic (that's his ethnicity). Thus, describing him as a "white Hispanic" isn't creating a new race, but reporting his race and ethnicity.
And, lilke, unless the NY Times is a time travelling newspaper that was in charge of Census 2000, it didn't create these distinctions.
Hope this helps.
It won't, two of the people on this forum, who think they are super intelligent, can't seem to grasp this.