People claiming that a caricature of Serena that doesn’t look like Serena is a decent one do not understand what a caricature is: it is an exaggeration of typical for that person features, and if that person is carrying features typical for her race, unless she can be depicted and recognisable without them, it is absolutely necessary to draw them, if the person needs to be recognised.
The two cartoons: the one with "Serena" looks like a little girl pointing at a man in a chair with an angry face.
It doesn't convey the level of intensity that was visible in the real situation that actually earned the privilege to be drawn, it doesn't say anything about the historical events, it doesn't even tell you why the heck that girl is pointing: in other words, it is a very bad job, and one that doesn’t deserve to be viewed.
The other caricature, if one doesn't know in relative big detail the history behind it, would look like a kid's drawing of a black person, so it is the story that the people link with that image, but since most people know it, it brings racial connotations with it.
However, note that that is not a caricature in the sense that it depicts a historic figure.
It depicts a race, but nothing else.
Again, the story is the one that gives the context.
So, let's for a second review what is the story that gives context to that caricature of Serena that is so controversial: is the story about her race, in which case the context exacerbates her depiction as racial, or is it about uncontrolled behaviour that just happens to be with the outer appearance that can be mistaken for something else.
I am talking only about the image of Serena here to which I see the most objections.
I think that (as cliché as it is) the people that view the caricature as racist solely or predominantly based on Serena's depiction, are either racists themselves, because they put her in a racial context, where there is none, or just people, who don't have a first idea what a caricature is, how it should look like etc