I have said before that what is not illegal is OK by me in so far as I respect the right of others to cause offence whether knowingly or unknowingly.
"The movement"! On the tiny moonlet of morris it might mean something but not in any real world.
I now longer dance and when I did it was Cotswold so we wore white - probably offensive to in a too "white" sort of way. If I had or were to dance Border I would have no problem blacking up.
Any "interest" I have is the wider interest of freedom of expression under the law and to uphold the right of others to express views contrary to my own.
You should try it.
And that is my last word. If you wish to claim victory from my silence hereinafter, feel free...