The Adventures of Tintin is widely regarded as a classic of comic art, but some issues are rightly criticized for racial stereotyping and a romanticized view of colonialism. This is hardly surprising, however, as the series dates back to the 1930s.
There are also several animated television series. The best known is a French-Canadian co-production with 39 half-hour episodes.
I have heard in the internet this comic is full of racist things. How much truth is there in it?
It is a product of its time and occasionally filled with pretty racist themes. It’s also very good.
Not that racist at all
https://www.theatlantic.com/entertainment/archive/2016/06/tintin/485501/