This last infographic is really strange, so the counties which are grouped close to each other are similar, yes?
So tell me what is so similar between Poland and India or Chile and Vietnam? These countries have nothing in common.
Race, religion, beliefs, political background, human rights, cultural differences - where is the common ground here?
Drive toward certain basic VALUES. Both Russia and Sweden are nominally christian countries, sure. In Sweden college students might be most interested in expression of their sexuality, while in Russia their primary concern is housing and finding better prospects at career. Just an example.
You can also notice, that while Israel is located between middle eastern countries, value wise, it is closer to central Europe.
EDIT: It is rather significant, as you see. Australian migrant would need very little adjustment in United States, while person - even very smart and educated, could feel quite an alienation if he came from Zimbabwe or Romania. In the same way, Romanian will see American as an alien, while Serbian or Armenian will adjust fairly quickly.
People often mistake vast cultural/value abyss separating them for racism, when it is not so.