During WW2, both my wife and I served in the Medical Corps. Many servicemen coming back from the South Pacific and Asia after jungle fighting had horrid hard-to-treat infections in the genital area. Infections were far less serious on men who had been circumcised.

We had our male children circumcised and made sure their male children also were circumcised. I doubt that a nurse who served in WW2 (or Vietnam), who dealt with jungle rot and other infections contracted in the South Pacific, would ever argue against circumcision. In WW2 there were only the rather unpredictable sulfa drugs. Treatments and antibiotics may be much better now, but because of our hospital service at that time, we would be hard to convince.