Hey, thats your opinion. But they were not making any effort to debunk Christianity. It might be something to debunk the shroud. Do you need the shroud to backup your religion? I dont.
I know it would have been noted in the Bible had Jesus looked different than other Jews. Since its doesnt, I assume him to not stand out from the norm looks wise. Historic record (skulls) of Jews at that time showed them to be rather stalky with extremely round heads. I believe art recovered shown to be from that time had Jews keeping their hair short and having short facial hair.
All of this makes no difference to me. Shouldnt to any Christian....I wouldnt care if he was black, green or purple, 3 ft tall or 8 ft tall... It is his works and his words that matters most.