davros - re "Some (American) studies (and the WHO, which is based in.. America)"
Are you seriously trying to discredit World Health Organization? 
WHO is part of the UN, by the way. it most certainly is not based in America. Its address is:
World Health Organization
Avenue Appia 20
1211 Geneva 27
Switzerland
"show that it reduces HIV transmission by a MASSIVE 2.4 % !!!! among a sample (how big, under what conditions)"
Try searching scholar.google.com to answer your questions.
Maybe start with these studies:
Orange Farm study, South Africa - 3,273 men - stopped for ethical reasons after preliminary results showed 60% decrease in infection among circumcised men.
Kenya study - 3,000 men - showed 53% decrease in HIV infection among circumcised men
Uganda trial - 5,000 men - showed 48% reduction in HIV infection among circumcised men
If you know of any comparable studies, done with so many thousands of people, please do share.
"When a respected governmental health organisation from a country WITHOUT a history of circumcision can categorically prove a MAJOR benefit and recommend infant circumcision as a standard practice then I will listen."
No, you probably will find some other excuse to dismiss that, too.