Reply #1: There has to be more to this story.

[Kutjara]

Guru Nanak died in 1539, so nobody would expect his appearance to "accurately reflect...current practices and beliefs." If we delete every picture of a historical figure that isn't wearing board shorts and a hoodie, our textbooks would be even duller than they are. "Napoleon? Nah, nobody wears pointy hats and jodhpurs any more." "Charlemagne? You've got to be kidding; I wouldn't be caught dead in those robes."

I'm sure this article is some sort of veiled dig at "them evil ferners" and their "whacky religions" but it's unlikely we'll ever know the full story.