I also have had mostly positive conversations and interactions with non-US folks about guns. I do find that Asians seem to be the most scared of guns, those from the Indian sub-continent quite open minded, and those from Europe most curious ;-) And lately, the Aussies the most angry
Several years ago when I went back to college and was in a major with a lot of non-US students there was quite a bit of interest from the men about guns and such. I was sort of casually upfront about the fact that not only had I shot a gun but that I actually owned guns. Some were not quite sure about how to react to that. Even though most were masters students, some were in the US for the first time and it was quite a culture shock for them to interact with Americans ... outspoken, opinionated, and much more assertive than themselves.
There was one man that offered to walk me to my vehicle after class one night (after a publicized assault on campus) that I accepted and when I got to my vehicle, I showed him the pocket pistol I had been carrying. He said he wasn't surprised, but it was his duty to protect women based on his culture and he wanted to show me respect. We still remain close friends to this day and he has visited my home town with his family to introduce his wife and children to me. After the second visit, he emailed me to tell me that his wife is "no longer concerned about guns in America if most gun owners are like [me]"
