He has two tattoos on his arm of a hand holding a lightning bolt which was the symbol of a White Power band. There's also photos of him wearing a T-shirt of said band so it's not something that can be brushed off as a "coincidence".
First of all, I have no idea who McInnes is, but aside from that, I can't find any 'white power' bands. I found 'white noise' which seems to be an electronic band from the 70s, but no indication they were 'racist.'
EDIT: If it is 'skrewdriver,' then yes, they were known supremacists. That doesn't make their music 'bad' though. I just found some on Youtube and they have a catchy tune... not like what I'd expect from 'white supremists.' (I was expecting heavy, heavy screaming metal).
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What do you stand for? What do you stand against? Where do you draw the line? Figure it out!