My general feeling is that immigrants should be tolerant, hard working and individualist. The second generation should be integrated into mainstream America, rather than clustered into a ghetto.I am with you 100% here. The good news, if you want to ask an immigrant, is that the U.S. is partly immunized against ghettos. Ghettos are caused by (and often require) two vicious circle type factors: a) An insular culture amongst the immigrants and b) An exclusive (exclusionary?) culture amongst citizens.
The great thing about the U.S. is that from the first day you land here, most people will treat you as an American. In my experience, this is one of the most powerful things America has working for itself. If someone feels like a part of America, the chances that they will harbor ill will for it are negligible and chances that they will want to insulate themselves from it are also low.
I think it is hard to design a racism test, so with the caveat that I don't have a better solution, I have the following problem with your racism test:
There is a high correlation between race and some religions. For example, IMO, the proportion of Muslims who are white is very low, while the proportion of Muslims who are brown is very high. So, in measuring the bias of say people from Pakistan against marrying whites, you might actually be measuring the bias of Muslims against marrying non-Muslims.
Actually, I don't think that is bad. My (potential) children will (and should) be free to marry whoever they choose Muslims, Christians, Zoroastrians, whoever. (Hopefully they wont marry a Scientologist!) Legally, though, discriminating against a religious group for not marrying outside seems like it may fall afoul of some religious freedom rights. Having said that, IANAL.
Regarding (2), it seems that you are using strong family / social obligations as a proxy for testing how much more 'liberal' or open minded compared to the 1st generation, the 2nd generation will be. I think this is such a warped and complex thing though, that it is really impossible to test.
Coming from a background with strong family and social obligations, and luckily from a family with negligible social pressure, I can also tell you it has many positives.
I also think it would be interesting to see how middle and southern United States measure on (2) vs most of the world. I suspect you won't see as much of a difference here as you expect.
Good discussion!