It can be far too easy for people who aren’t directly affected by racism to dismiss it as a thing of the past. Over the last few years, both FIFA president Sepp Blatter and Chelsea manager Jose Mourinho have both denied the existence of racism in various aspects of football. But, in quick succession, a group of Chelsea fans in Paris and former Italy manager Arrigo Sacchi have provided crystal clear reminders of just how incredibly wrong that notion is at every level.