Just saw this & haven't read the whole lot, but as a former Immunology researcher, here are a few points that totally make a mockery of frequent feeding causing allergies
1) food allergies & milk intolerance & MSPI is almost non existance in 3rd world countries
2) in 3rd world countries babies are demand fed, most if not all are actually attached to the breast for HOURS & it is actually common for night feeds to still exist in 3rd world countries well into 2nd year.
Based on research the biggest factor in MSPI & dairy allergy would actually be parents & grandparents who were fed straight cows milk as babies & then pass on the antibodies to their child.