The small pocket created by the redundant skin can collect moisture and harbor infective organisms. On the other hand I have met Jewish physicians who were against circumcisions being performed by untrained rabbis because this resulted in unnecessary complications. About 350,000 are already infected. Anti-Semitism was an invention created at least partially by the Tsarist authorities as a way to divide the outlying regions of the Russian empire. Also valuable part of a man that provide pleasure are lost in circumcised men.
Modern medicine is aware that circumcision is of minimal hygienic importance.
All that a man must do is keep himself clean any good doctor knows this. Male circumcision is less of an evil than female circumcision because in female circumcision most all feeling is lost but in a man only some feeling is lost. Bad is still bad regardless of wether it is more or less bad. Circumcision was used in some ancient culture also to limit mens ability to please themselves so that they will more likely impregnate their women thus they create more of their people. Most Europeans understand that circumcision is mutilation.