@Diljotsinghsarao, Every religion has millions of martyrs and different religious customs may be contradictory to eachother. When it comes to a specific thing like boxing here, only the laws of the sport need to be respected since this will bring everybody to the same platform. Islam's burqa, Nose piercings, bangles, etc have been banned in other times as well. So Sikhs need not be special snowflakes. A lot of Sikh cut off their 'kesh' for the heck of it.