[smudgie]

Having lived in both South Africa and Zimbabwe and our history lessons were full of the Southern African history I can still say I don't see it as racist.
The British were at war with the Zulu and did indeed kill many, but they also made their peace over the years.
The Zulu tribe also killed many and massacred innocents from other tribes.
That is in the past.
Celebrating what great warriors they were and dressing in their traditional dress
Could be seen as a celebration of them rather than racist, depends on your mindset I suppose.
It is fancy dress in a parade by one of seven historic groups.
I would be more concerned that people feel they have to hide our part in the history of the world. Good or bad.