To circumcise or not to circumcise?

[GrandizerII]

You don't know that. It sounds like a load of horse crap to me.

"Randomized Controlled Trials of Interventions to Prevent Sexually Transmitted Infections: Learning From the Past to Plan for the Future"
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912604/

Four trials have evaluated male circumcision as an STI prevention intervention; 3 evaluated STI endpoints among male subjects randomized to either immediate or delayed circumcision (58–62). The fourth assessed the impact of STI risk among wives of men randomized to the procedure (63). Male circumcision appears to provide significant protection against viral STIs. In addition to the 50%–60% reduction in HIV acquisition consistently demonstrated (108–110), HPV prevalence was reduced by about one-third (61, 62), and HSV-2 incidence was reduced by 28% (62) in the trials that assessed these endpoints.

From the first link, here's the relevant section:

Four trials have evaluated male circumcision as an STI prevention intervention; 3 evaluated STI endpoints among male subjects randomized to either immediate or delayed circumcision. The fourth assessed the impact of STI risk among wives of men randomized to the procedure. Male circumcision appears to provide significant protection against viral STIs. In addition to the 50%–60% reduction in HIV acquisition consistently demonstrated, HPV prevalence was reduced by about one-third, and HSV-2 incidence was reduced by 28% in the trials that assessed these endpoints.
The impact of male circumcision on curable STIs was mixed. Circumcision reduced T. vaginalis acquisition by almost half among wives of men who were circumcised in Uganda and among circumcised men, themselves, in South Africa, although the latter was of borderline significance. However, prevention of T. vaginalis infection was not demonstrated among circumcised men in the Kenyan RCT. Mixed results were also observed for chlamydial infection. Although a borderline significant reduction in chlamydia of >40% was observed among circumcised men in South Africa, the procedure did not protect men in the Kenyan RCT. Neither trial that assessed gonorrhea observed a protective effect of circumcision, nor did the 1 trial that reported syphilis results, which had limited power to evaluate this endpoint.
The male circumcision trials were all conducted in sub-Saharan Africa and were powered primarily to evaluate the efficacy of the procedure in preventing HIV. Follow-up rates were over 90% in the 3 trials that reported this information, and adherence was not an issue for this surgical intervention.

According to the last paragraph, the findings are based on sub-Saharan African samples. The problem with this is that you can't just unconditionally generalise all these findings to Western populations.

Also, notice the mixed and conflicting findings among these trials and how the report here is not as confident as you appear to be regarding the health benefits of circumcision.