Grumpy Old Man
Striker
One is imitating a people by the colour of their skin, one by their traditional clothes.
Stag-dos wearing lederhosen aren't offending Germans, football fans wearing berets and striped t-shirts aren't offending the French, a few morons wearing headscarves are not offending the Saudis.
I've been in Berlin, and seen the reaction of Germans there to them. It does offend them.