A person who owns copyrighted material, has the right to demand it not be used in a slanderous manner. Or in a manner that is disrespectful to the creator.
In this particular case, what I figure, is that whoever created the Song, or the Images, saw how they were being used, perhaps took offense at how they were being used, and thus, had Igiss remove them.
(Waratah created the sigs, but im sure he didnt draw the original images, therefore he has no say in the matter, and is breaking laws himself copyrighting his modification of another persons artwork)
The only thing that seems suspect of course is that they found Igiss, and that he actually did something about it. Why the person would care who contacted Igiss, i dont know.
Being native american myself, i can see how the Indian's portrayal could be offensive. Im not offended, I actually find them funny. And, I did try and help there RP, but got no response...