Red Hair and British Israelism

Came across a few mentions of red hair on Wikipedia's page about British Israelism;

"British Israelites often quote the ethnological work of Assyriologist Archibald Sayce who discovered from ancient artwork and tablet descriptions in Palestine, that the Amorites (Akkadian: Amurru) were a pale skinned, blue eyed, red haired race. Flinders Petrie also wrote they were fair haired."

And;

"Apocryphal historical texts are also often cited which describe Jesus as golden or red haired, these include the Description of Jesus by Publius Lentulus which describes the hair of Jesus as chestnut (reddish-brown) and his eyes bright blue[.]"