I think I am stopping one step before you. Which is understanding whether something is racist or not. Using purely your cultural understanding to define it is going to lead to misunderstandings. In this case, understanding the context and the real intent of the picture makes it pretty clear that race has nothing to do with it. If you choose not to understand the context and just mark as racist anything that if done in another context would be racist, be my guest, I will just disagree.