I was introduced to Tintin comics in high school by my American-Belgian friend Ruthie. She read the stories in their original French editions.
Yes, some of the early installments of Tintin by Georges Remi, aka Hergé, are racist. Yes, the Nazis allowed Remi to work undisturbed in German-occupied Belgium, leading to his arrest as a collaborator after the war. The case was later dropped.
The Adventures of Tintin, from 1991-92, is a mostly faithful cartoon adaptation of the books, minus the objectionable material. Some enterprising person has made the series available online in its original aspect ratio. Some other copies are zoomed and cropped to distraction.