ISnt pasteurization done to kill all the germs which could cause disease.
In India, ppl can buy unpasteurized milk straight from the dairy farm. And then they BOIL there milk for good amt of time to kill the bacteria.

Yes, pasteurization kill germs that cause disease.  The problem is that it also kills beneficial bacteria that can aid digestion and otherwise promote health.  For example, many people who thought they were lactose intolerant have found that they can drink raw milk with no problems.  Raw milk also produced superior fresh and hard cheeses, many believe.