please answer all or none of them.
Only question 3 is an actual debatable question and this is a website I use to debate.
Do you believe that American society is - on average - more racist than the rest of the world?
No. This is because of a few reasons. America is such a huge society in the first place, compared to most nations, that it has more range even within itself such as the average southern-State resident is more racist as are the institutions there, than the Northern or Western ones (America's 'east coast' seems to come under its North for some reason and its West does too even though California is actually in the SouthWest, it counts as West).
That's just the first reason. The other reason is that America was so unbelievably racist and brutal to the race it held inferior that it had the same bounceback against racism as Germany had post-Nazis. Unlike, Oromagi, I know that the Japanese are not racist much anymore. In fact, Japan and South Korea are so close to non-racist social democracies that it is fascinating how racist and harsh China and North Korea are in comparison (given the proximity).
As for the past, Japan was probably the most racist of the East Asian nations and cultures. The Samurai were even ethocentric racist meaning they thought the Samurai lineages were inherently superior bloodlines to the rest of Japan's bloodlines and within Samurai bloodlines deep rivalries between distantly related bloodlines happened often, even siblings did especially if there were times when it wasn't clear who was the father of a certain concubine (wives were off limits for other men but the concubines a Samurai cheated with were not, so the same Concubine at times had two Samurais inseminate her).
The Middle East and Islamic nations in general are extremely ethnocentric. This is also the case for severe Christian nations, such as Russia, Uganda and Honduras. Racism doesn't tend to mean what Americans think it means always. For instance, in Sri Lanka, there was systemic racism but both ethnicities involved were brown-Asian (Sinhala/Sinhalese and Tamils). The issue with this is that you can't go around thinking racism is only white-on-black if you analyse it worldwide. The reason it is indeed that in America is that Caucasians have been unfairly superior there ever since the brutal invasion and pillaging done to the natives through to now.
So, since America is more open about its racist attitudes and has variation inside it, it isn't the most racist nation whatsoever. It's actually one of the most actively fighting against its racism at present, which is a great thing to see.