good! much easier to talk with people that appreciate stats and studies. of
course it is still easy to only look at information that backs up what one already believes. he
should be familiar with that concept. and it certainly is no cut and dry topic. there are some real potential concerns. just like with anything the risks and benefits must be weighed and the tolerance for risk is different for everyone. some people would rather choose the known risks for the unknown risks. you can argue with incorrect information but you can't argue with choices. choices are choices.
I think I know at least somewhat the position he is coming from. I generally also start with the idea that "there is a reason why we do things a certain way" and "science is the truth" however through my life experiences and having come to the understanding that science is only as good as those conducting the thinking and experiments and studies and interpreting the data, and realizing that those people are just as human and subject to the same biases, blinders and agendas as anybody else; I realize that some scrutiny, even by us lay people is justified and useful.
I have found that those "reasons" why we as society/doctors/governments/scientists do things or reccomend things may have been long ago mitigated by other practices, are only applicable and justifiable in certain situations or to the majority of people, or they started off with a faulty premise to begin with and the bad apples at the beginning have spoiled the data and interpretations that have been piled on top of it.
you might be totally upfront with him and explain that raw milk is somewhat of a fad right now. and because of that it can be difficult to look for info without finding a bunch of easily discredited information from those caught up in the fad. I have seen sites that tout raw milk as a miracle cure for everything. anytime you see the long list of either cures or ailments caused by a food or supplement you can pretty well turn away confidently knowing that you are unlikely to find any good concise info there. and it (IMO) is a waste of time trying to sift through and sort out the bull from the few real tidbits at those places. but that doesnt change the fact there is some credible information out there to be had.
note: you can always pasteurize the milk and feel better in that you found a non homogenized source (assuming that it is). I pasteurized all my milk the first year. it was a big step for me just to have homegrown milk. to see and feel and know my source and to see the reality first hand. it can take some adjustment.
somethings you might approach with him are. the history of milk production and why it started getting pasteurized adn regulated. TB was a big one as well as adulteration.
the present state of typical milk production and the hazards it truly would present if that milk was marketed raw. very real imo.
the difference between a small or home
dairy operation and a large producer. the first hand caretaking of the animals especially.
next I would find a list of the potential problems with raw milk. TB, listeriosis come to mind right off hand. having a good understanding of how these infectious diseases come to be, proliferate, make animals and people sick as well as their prevalance in the population and how it is monitored and mitigated, is key to putting the risk into perspective. sometimes pointing out the risks someone is already taking but are simply accustomed to helps. listeriosis and lunch meat is often sited. or ground meat from the store and fecal contamination. some things you really don't want to know!!!
but it is the truth and it is useful in that regard in making informed decisions about those particular things as well as for comparison to others.
if I get a bit of time I will try to track down some of the links that have convinced me. its easy to find stuff about raw milk.... its hard to find real data that is acceptable to suspicious minds sometimes. it is very off putting, for me at least, to accept info from places that have obvious discredible information or heresay along side the good stuff and I suspect he will feel the same way.