Brainwash them when their young, that's a great idea. It's worked for many dictators over the time.
The fact that you drag dictators into this discussion as a comparison is worse than the whole matter being discussed. That's really low.
And adding the fact that Zwarte Piet and the whole Sinterklaas celebration has nothing to do with racism makes your post even worse. You make it sound like we use our Sinterklaas celebrations to brainwash children into thinking that racism is good. That's some twisted shit man.
The only matter we need to adress here is that the Zwarte Piet character in it's current appearance is seen as a racial caricature by a small group of people. To comfort those people and able them to enjoy this feast as well something should be done about Piet's appearance. By having all sorts of variations on Piet there's already been a huge step forward compared to previous years. But as most people probably know, it takes time to change a tradition that's been going on for more than a century now. I'm fairly sure we'll get to the point at which Piet in it's current appearance will be gone, but it won't happen over night.