The latter. I'm just saying there is enough out there discouraging the use of casein that it worries me a bit. I wish I had more confidence in it, because it's ability to stick around in your body and provide a slow drip of protein is unmatched.
6000BC, that is the oldest known date for people drinking milk... I am not that worried. True, there are other issues to worry about with milk, like bgh and somatic cell counts.
Of course everything in moderation, I find no need for milk based supplements.