Best thing perhaps is to put this drawing into context.

Most Belgians of the 'artist's' age will have grown up with depictions of black people similar to this one: http://www.asterix-obelix.nl/images/.../c-pirates.jpg from the Asterix & Obelix books.

The black pirate's features were changed for the English translations destined for the UK (I couldn't help noticing how the same character looked different in my Spanish and English versions which created a lot of questions for me as a child) but the link shows the original version, which has always been perfectly acceptable in Belgian.

This drawing would certainly be rasict if it had been published in Britain. But in Belgium.... misguided, certainly. Badly drawn? Absolutley. Racist? not so sure...