I only speak a tiny bit of French, though this seems to be greatly appreciated. I could imagine being treated rudely if I didn't know any of the language (and rightfully so).
I couldn't disagree with this statement more. I spent my school years learning Spanish. I believe I should be treated well even if I go to China or France, places where I have little-to-no language ability. That said, the French people I met in Paris and Nice when I visited seemed quite nice to me. All this is predicated on the traveler treating the locals respectfully