on what you mean by milk. What you get from tit or the homogenized milk-like product you buy from supermarket.

"Homogenization breaks the fat into smaller sizes so it no longer separates, allowing the sale of non-separating milk at any fat specification." http://en.wikipedia.org/wiki/Homogenization_%28chemistry%29

This denaturalized industrial product is the cause of of chronic upset stomach, not milk.

My cousin grew upon a farm with raw milk and couldn't drink the stuff and all that shows is that anecdotal evidence is pure bunk.

and I'm no expert. Here's what quick search brought up:

"Some researchers believe that these protein-heavy fat globules can potentially increase homogenized milk's ability to cause allergic reactions. Numerous studies confirm this, at least with rodents as test subjects. Other known effects on milk quality include increased viscosity (the milk is thickened in consistency) whiter appearance, lowered heat stability, increased sensitivity to light-triggered oxidation and less pronounced milk flavor."
http://www.raw-milk-facts.com/homogenization_T3.html

For me it's more of a common sense issue, our digestive systems and bacteria populations that are parts of us have evolved and adapted to natural milk, not to the homogenized product. There's been lots of talk about this issue where I live, and just few weeks ago I found out that also unhomogenized milk is now industrially produced and sold in supermarkets.

unless our ancient ancestors were suckling on the teats of cows we would not have evolved to drink it.

is both science and common sense. And we've been living in coevolution with cows quite a long time. Not to mention from unhomogenized milk from mama's teatt.

Since I eliminated Carrageenan from my diet, I no longer have acid reflux.

"Carrageenan is a commonly used food additive that is
extracted from red seaweed by using powerful alkali
solvents. These solvents would remove the tissues
and skin from your hands as readily as would any acid.

"Carrageenan is a thickening agent. It's the vegetarian
equivalent of casein, the same protein that is isolated
from milk and used to thicken foods. Casein is also
used to produce paints, and is the glue used to hold
a label to a bottle of beer. Carrageenan is the magic
ingredient used to de-ice frozen airplanes sitting on
tarmacs during winter storms."

http://www.notmilk.com/carageenan.html

and have unpleasant symptoms if they try to drink milk. Those people should not drink milk.

Others do just fine drinking it.