@Walter Hinteler,
Except that the Germans conquered Paris and the Americans liberated it.
In addition, the Finn of 1971 was not the Finn of 2014.
First of all I was 17 and had hair down to my waist. I dressed in all the required hippie regalia and actually could speak some French.
Secondly, I arrived in Paris as close to a left-wing radical as a kid just out of HS could be. I had joined my older brother and his friends at the 1969 anti-war demonstration in Washington D.C. and got suspended for publishing "subversive" articles in the school newspaper.
Thirdly I arrived alone and not part of an American tourist group or any group. I was not walking around speaking English loudly, making fun of French customs, or doing anything to attract attention, let alone anything that might offend anyone.
I was spit on by a very well dressed women to whom I said "Pardon" because she acted like I had bumped into her (I did not).
I had trash thrown at me by construction workers (at least they were probably just doing what they did to any kid with long hair).
I was treated rudely and insulted constantly, particularly when I spoke to anyone in French. (Ironically, my idiot HS French teacher who urged me to make the trip assured me that not only did everyone speak English in Paris, they loved it when foreigners at least tried to speak French)
The discussion with the three French college kids at a party began with us all bemoaning the faciist state of our respective governments, and agreeing that the Vietnam War was a terrible mistake engineered by LBJ, it ended in a fight when I expressed how I felt bad for the American kids who had been drafted and were fighting there; noting that I knew a few of them, a relative and a couple of my brother's friends and they loudly insisted that I was full of ****, that all the American soldier there were war criminals and "baby-killers." The fight got physical when I told them there problem was that America had pulled their asses out of two World Wars and they didn't know how to show gratitude. Not the smartest thing to say under the circumstances, but it felt very good.I taken enough **** by then.
Now, if you think that's an understandable way to treat a guest in your country who traveled alone all that way because he wanted to see Paris and meet French people, then we have different understandings of hospitality and common courtesy.
I met maybe 10 people who were actually friendly towards me (and I don't include the three guys at the party). Five were the members of the British band I left Paris to go to London with, and two were very cute French girls. I'm sure there had to be some other decent Parisians somewhere in the city, but you couldn't convince me of that at the the time or for many years latter. Frankly I'm not sure I actually believe it now.