I don't see the medical benefits to snipping a newborn. Babies are not at risk of STDs from having unprotected sex. Possibly a risk of infection due to lack of cleanliness but not really serious in the vast majority of cases. Risks of snipping a newborn: snip too much (penis gets messed up), snip too little (have to snip again), possible malformation of the penis during growth, possibly pissed of adult.
Snipping newborns is garbage, there is no legit reason for it.
I have no problem with getting it done for medical problems (as with myself) or letting adults get it done providing they are given correct information (because most of it, from both camps, is bullshit).