People in different countries drive with vastly different driving conditions and driving mores among the population. I figure I'd be in trouble within a block in many cities of the world and that people there would make fun of me for being a standing oxen on the road. People in italian cities drove in what to me was a free for all that even I could see had its own rules and I thought after the first shock that the drivers were pretty good, just different than I was used to. People making fun of drivers new to southern california freeways might make slightly more fun of Asians new to the country, but the same freeway system and its rules of the road would also throw some americans for a loop, and they would just be called stupid asses or similar names.
Observation of certain people having difficulty with new places doesn't mean someone is racist.
On the other hand, americans have been racist in the past and present and some of us try to get away from pegging people in race categories. Which brings up that there is no such thing as race except as a social concept. (There are threads about that.)