Delete ref to Jan Biro? 

72.75.57.130 just deleted the following sentence and reference because the source is written by Jan Biro, whom the editor says is a white supremacist. I reverted the deletion, but I'm interested to hear other people's thinking about this material.
 However, such statistics do not rule out factors other than intelligence, such as institutional biases and social networks.Jan Biro, "The Jewish Bias of the Nobel Prize." Karolinska Institutet, Sweden, 2011
 
Here's why I currently favor keeping this. The author has credibility due to his association with the Karolinska Institutet. It argues a minority position about how the Nobel prize is chosen, but we don't claim that that position is correct. It seems to me an excellent source for readers who are interested in further information about explanations other than higher intelligence for the prizes cited earlier in the paragraph. We implement both WP:NPOV and WP:WEIGHT by this brief reference at the end of a paragraph that covers the opposing view in much more detail. —