Not wishing to turn this into a yes it is, not it’s not, yes it is, not it’s not argument, I can only state what is so and allow you to decide to disbelieve it.
Golliwogs are fictional, they are not grotesque depictions of black people, and it is sad some folk insist on seeing them as such.
Auschwitz dolls by their very name/description have to be grotesque depictions of Holocaust victims with associations to a time when they were profoundly repressed, enslaved, abused and murdered.
The differences are not imagined they are blatant.
So the conclusion has to be that whether it is done on a conscious or unconscious level, any railing against golliwogs is surely just trouble raising.
Besides Godwin's Rule has effectively decided this now :-)