What? The advert or pulling out of the concert?
I don't think it is. There's two sides to the Israel/Palestinian conflict and, if I was Israeli or Jewish, I would probably be frustrated that everybody seems to be taking the Palestinian side the whole time. It's not as if the Palestinians are saints.
Personally, if I were in high demand for my singing, I would keep clear of the whole area until they'd sorted it out, which probably means for ever.