It doesn't really matter, and I'm not trying to be argumentative, but just look at the facts we have. (also excuse the use of Negroid, if anyone can suggest a better term I will gladly use it)
He was definitely not black. Not northern European or Mongoloid either. A Semite. Like the basic protoype seen in Israel/Palestine, and Syria (ommiting the features that come from later people's, like the Arabian, yes use of the word is intentional, Sudanese, Greek, Circassian and Turkic), and from an old Jewish family. One of the family traits was red, curly hair, and ruddy skin (see David) which came from Moab. Never a mention of Negroid anywhere.
Working outside for most of his life, he was probably browned and weathered. Presumabely bearded, as any respectable and observant Jew would be (there had begun to be lapses, but the Galilee was more conservative). Skullcap too (even the Greeks tended to wear felt headcovers)
Hair would cover the nape for the most part, and there would be long side-locks.
You can say he was Negroid all you like, but it's as preposterous as saying he was Nordic. Just look at where he came from.
Nowadays there are plenty of Arabs with Negroid characteristics, but these are mostly descendants of 17/18/19/20th c. Sudanese slaves in the Bedouin society.
The common depiction of Christ in Western art, is actualy based on the face of Zeus (from the statue that was one of the 7 wonders).
I just hope nobody takes offence from anything written here, as none was intended.