Here's the rub with any form of racism...
Racism is a prejudice. In its purest form, it doesn't have to be a negative slur, it can be a positive prejudice, but it's a prejudice all the same. One based on someones race, or perceived race.
If we say 'the French are lazy' - it will typically offend
If we say 'the Welsh are great singers' - it probably won't offend
Both are examples of assumptions being made because of nationality.
But what do we do when certain nations have characteristics in their cultural history? The British have been quite renowned for scientific achievement. The Welsh have been known for their choirs. Not every Englishman is a scientist, and not every Welshman will be good singer.
Ask two children to paint someone from China and someone from Iceland. The chances are, they will give the Chinese face a yellow tone, and black hair. There's a pretty good chance they'll portrait the Icelander with fair hair and pale skin. Yet neither are categorically true. Is is racism?
I use the term 'racism' loosely, as often it's not race we are stereotyping but someone's nationality, but it's a broadly similar issue.
If we completely abandon all stereotypes, life becomes very difficult. Could we portray a Chinese rice farmer in a painting if we argued he COULD be wearing a bowler hat and sporting a handlebar moustache?
Could we portray an LA gang member as white, wearing a cardigan and brogues?
If I mention a far right English hooligan, almost all of us will visualise a tattooed white person, with a skin head, or very short hair. This is a an assumption being made on our part. They may well be female, wearing a cocktail dress and very eloquent.
I think we ALL incorporate such assumptions in our thinking, in our art, our music, our films... which ultimately makes us all racists.