I'm a type O and I have no problem with any dairy, however, raw dairy doesn't cause allergies because there are only live good bacteria in it.
It is the good bacteria that kills off the bad.
Also, the reason people have an allergy to pasturized milk is due to all the 250,000 pathogens being killed and their dead bodies are still in the milk along with pus from the diseased teats.
This causes a histamine response.
Another possible issue can be due to the A1 mutant gene in holstein cows