I had no idea Islam allowed any kind of anime or music at all. Isn't this show itself sacrilegious to Militant Islam anyway?
Lets also be frank that if this show offended or appropriated any other faith, any and call concerns would be mocked, ridiculed and ignored and priaised as a success by the Twitteratti. Christianity and Judaism are scorned and hated by all progressive governments and societies, because they tended to promote societal success without directly appealing to satanism or hedonism, the two main pillars of post-modernism. Giving in to radical islam is not going to help Japan or anything else, since it serves only itself and not either conservatism/liberalism or far-left communism/socialism (or national socialism, also highly ethnocentric). Arguably, open borders and the abolition of culture is only a suicidal notion, since it serves nothing but its own destruction. And in case you missed it, yes Japan has a growing problem with militant islamic separatist society.
The real question is; which of the two will come to regret the unholy alliance between the Left and Islam first? If the left takes over, like in China, Islam becomes a discriminated minority. Is Islam takes over a society, all liberals are killed. Don't see either one being too good for the future of either music or human flourishing.