There's mainly two types of paleo dieters. People who like the diet because that's what we're more adapted to, and people who avoid grains because they believe them to be poison.
The first type is going to be paleo anyway even if grains have health benefits. Second type has some interest in proving how toxic grains are as their main argument.
I almost like the word "primal" better than paleo because it seems like a less dogmatic word. with paleo you have all this talk about what's Paleolithic, what's Neolithic. I think primal seems like it's more about getting to our dietary roots. Ironic since I don't agree with a lot of Mark Sisson's ideas (keeping carbs below 100 g being one).
I like the blog Whole Health Source and Stephan is not afraid to talk about grains in a positive light. Although he is affiliated with the Weston A. Price Foundation which is not paleo but has their own dogmatic style which I find annoying. I think that grass-fed, organic milk even if pasteurized is still a better choice than conventional milk. I remember hearing about how some cultures like their milk warm. I doubt heat is that harmful to milk. Soy is not that bad either, although in large amounts and through extreme processing it possibly can be. The Japanese eat moderate amounts of soy and they are very long lived.
Ever since my departure from veganism I've been looking at different diets. I even considered eating a high fruit diet (which is why some of my posts on here were rather defensive about fruit and carbs). I'd be lying if I claimed to be committed to paleo. I post on raw food sites too, despite eating cooked food. Maybe one day I'll go 100% paleo or find some other diet. I'm trying to be healthy without being dogmatic and puritanical about my food.