French poll

My mother and I did some grocery shopping at the Whole Foods Market in Albuquerque today. Whilst pondering the pros and cons of a particular item, a nearby shopper interjected that it sounded like a good product, "except that it's from France". I calmly responded in tempo, "There's nothing wrong with France," which fetched the reply, "There's plenty wrong with France." The man walked away. I, undercaffeinated and therefore unenergetic, declined to pursue him for further details.

Should I have attempted to open a dialogue with him? Given that his motivations may have been based on politicized misinformation, should I have attempted to lead him from a path of jingoistic xenophobia toward a more enlightened, international view? Does it matter that I am a liberal living in a low-population purple state where a single vote could conceivably swing an election?

Happy Boxing Day!