Maybe I can help out. There are a couple of things to consider.
First, Professor Jelinek recommends a plant based diet that also includes fish. There is probably a good reason for this recommendation. The epidemiological research shows that those who eat a plant based diet plus fish live the longest. Those who consume milk do better than red meat eaters but not as well as those who stick with fish.
Second, if you look at http://www.nutritiondata.com
and look up both wild caught canned sockeye salmon and milk, for example, you will see that the sockeye salmon wins hands down. It is loaded with helpful Omega-3 fatty acids--especially DHA, which some scientists think may be the most important Omega-3 fatty acid. Also, it has much more vitamin B12 and even a good dose of our very helpful vitamin D.
It seems that non-fat milks are not your worst bet but they are not the best either. For the diet that has stood the test of time, one sticks with a plant based diet that includes fish.
Since I started eating healthy, I've noticed I have only so much room in my stomach. I simply can't get the really healthy stuff I want everyday and still have room for the less than healthy stuff.
Hang in the on the diet and be sure to get enough Vitamin D3 too. If you do nothing else but these two things, you will be 80% of the way home!
It's great that you are following up and trying to really understand this stuff. Knowing the reasons helps you stick with the program.
All the best,