It would be wonderful if skin colour/race/faith/nationality didn't matter,but it does.
So far as I'm aware, my heritage is white British, so I haven't experienced racism. As a woman, I have experienced sexism and in recent years have developed some understanding of what it's like to have mobility and other problems. I have never been racially abused, or treated differently because of my colour. The closest I've come to this is when an elderly woman in a remote town in Tunisia began to shout abuse at my husband. She was reacting to photographs all over the papers that day of a funeral party in Iraq that had been devastated by US bombing and the fact we were white and English speaking was enough for her to direct anger and distress our way.
I've never had people making monkey noises at me, calling me offensive names or attacking me in the street, simply because of the colour of my skin. My children have never been suspended from school after they finally snapped as a result of persistent racism, and hit someone who'd been tormenting them for years.
I had the task of completing diversity forms for every child and family member during the course of work. It was tedious, time consuming and I grumbled along with others about this. But - I echo what Eloethan said (16.52) about its necessity