Even if it was an anti-Maiden message (and it appears now that it likely is), who cares?
Adrian Smith, Steve Harris, Bruce Dickinson, Dave Murray, Janick Gers, and Nicko McBrian are grown men and can take an insult or two.
Is it disrespectful? Yes. Is it worth getting our panties in a wad over? Not really. I think the more important issue is the fact that a Maiden show was ruined for thousands of fans with all the BS being discussed on the other thread.