This is the first correlation I've ever seen between the Indy logo and "that" iron cross to be honest, from skaters or others. It's a symbol that was used prior to naziism, with similar symbols used by other cultures (see also: the swastika) and if there are any Europeans that can correct me if I'm wrong, is still used in some capacity by the German military. Nazis rip/ripped off all of the symbolism they've ever used that always seems to become associated with those pieces of shit, but I would assume if someone was to see that symbol in particular (since it's used for so much) and you were to explain yourself, issues are unlikely.
If you're looking for something to be offended by, get a fucking life.
Also, I would argue the use of "1-8" could be more correlated with naziism than the iron cross.