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.
I provided at the very least an interpretation that is coherent, conscious of the cultural context and that makes sense considering the content of the text/article for what the image is used for.
So you refuse to elaborate, because your opinion is self evident, even though it is based on a lack of cultural context, and lack of understanding of the content of this very page.
My opinion, which I shared and elaborated, which is based on understanding the cultural background, the content of this page, knowing this rag, knowing what newspapers use and do in general, is automatically invalid - without argument - because it doesn't fit your view. It doesn't matter that I explicitly shared an interpretation that has nothing to do with race, which is plausible, coherent (I.e. matches the content) and context-aware. You are right by default because your cultural lens is the only thing you ever need to interpret the world.
Yes, colonial mindset refers to the refusal of accepting other cultural backgrounds and cultural lenses, possibly due to an inherent belief that your own is superior or absolutely correct. This is not so uncommon in people coming from an imperial and hegemonic culture (like US). Edit: the colonial nature results evident from the fact that such position translates to the desire/pretense to impose a specific cultural lens or perspective even to facts, discussions etc. that belong to completely different contexts. The same attitude that colonizers have over the colonized.
I have already discussed the merits of the conversation, you refused to elaborate your thought in any way and you are limiting yourself to meta-comments that do not add anything to the conversation. In fact, you wasted several replies not saying anything but implying that your opinion is self-evident, which is a consistent symptom of that colonial mindset I was talking about.
You have been provided with a different, context-aware interpretation and you refused to engage with it at all, including challenging it, because being different from your own is automatically wrong and not deserving even of consideration. In fact you are still stuck on "racism against black people and indigenous people", which means you didn't even take into consideration that your interpretation of something happening in a cultural context you don't understand might be wrong. Of course you also refused to elaborate on the way this is racist, or better, you did in another comment in this post with an explanation that has to do with how racial stereotypes have historically been used to discard opinions of minorities, which while being true doesn't apply at all to this particular event and in general is quite tangential in Italian history, due to a completely different history compared to that of the US, especially when it comes to indigenous people.
So yeah, all in all I think you are showing a classic colonial mindset.
Quite common in internet spaces where US culture is dominant, if it is of any consolation.