My 2 cents from my time and perspective working in public health
We use to get the odd letter regarding this issue. The CMA currently does not recommend it but there are a few public health journals that do advocate a slight benefit to the procedure. The science behind it shows that the tissue is rich in immune cells, similar to all cells that are near our openings and vital areas. The higher concentrations of immune cells serve to protect us from STI and other infections (besides sexual function, the male organ is used to void waste and we males have a tendency to stick it into foreign places). On the flip side though, HIV specifically targets the immune cells, hence the findings that those that are circumcised may have a decrease risk in getting HIV/AIDS as the uncut members present a more target rich environment for the virus.
Keep in mind, as I last recall, almost all of the studies that do show a benefit in the protection against HIV were from the African countries (better experimental population as there are high rates of HIV, and condom use is low). Even then, the debate is on how significant this benefit really is. In our society, the use of a condom, not only to prevent STIs by pregnancies as well, reduces the benefits of circumcision to just about statistically negligible levels.
Therefore, it really boils down to personal choice. I wouldn't make this decision about preventing HIV or other STIs. Just like any medical procedure, there will be inherent risks associated with it. However complications are very low as it is a very common procedure. The removal of the foreskin will lead to some loss of stimulation. How much so is up for debate as some say it's minimal while others say it's significant (as it's a feeling, unless there was a way to do a before and after, measurement is very subjective). There is also a matter that this is an elective procedure so you’ll have to pay for it yourself. If it's a religious/traditional choice, I won't argue with it as that's your choice on how to raise your kids. Lastly, the rate of circumcision is falling and it’s under 40% now.
For me then, I wouldn't have my son go through it as I see it as a choice issue. It's his body and he should have the final say. Sure boys have to be sure to take a little more care cleaning their unit, but the same could be said about leaving ones wisdom teeth in place. If he decides when he's older that he wants to be cut, then he can make that decision himself.
My 2 cents
P.S. and to answer the original OP, the fault is the medical doctor that performs the medical procedure unless there were some additional circumstances
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