Dietary lectins cause auto-immune disorders?

I watched this video about a week ago, but I'm just now getting around to blogging about it.

Basically, in the video below, Dr. Loren Cordain is discussing a model of auto-immune disorders in which he believes that they are all caused by dietary lectins in genetically susceptible individuals. So, what's a lectin?

From the current issue of the Paleodiet Newsletter:

The word “lectin” is derived from the Latin verb legere, meaning to “select,” and because of their high affinity to bind just about everything in biological systems, lectins indeed “select.” Lectins were originally defined by their ability to agglutinate (clump) erythrocytes (red blood cells) in tissue cultures, but more recently have been described by their ability to reversibly bind specific monosaccharide (simple) or oligosaccharide (complex) sugars. Lectins are omnipresent proteins found in the plant kingdom and likely evolved as toxic defensive mechanisms to ward off predators. Most dietary lectins are benign and non-toxic to humans, however the primary exceptions are those lectins capable of binding to gut tissue.

Read the rest here, although this particular article is about how lectins may contribute to heart disease, not auto-immune disorders.

If you, or anyone you know is suffering from an auto-immune disorder, you may want to check this video out.