There is a fourth model: If we must have immigration (and there is nothing that says we need immigration, especially mass immigration) we choose people that are already as most like us as possible instead of as unlike us as possible.
Whether they are like or unlike us matters far less than how adaptable they are. Whether naturally adapted or encouraged, possibly even mildly coerced into adaptation also doesn’t matter.
This is found in places where immigrants are required to use the language of the majority, as well as following cultural norms and obeying the secular law. The icing on the cake, however, comes with the willingness of immigrants to condemn members of their community that offend the majority.
When an immigrant group “closes ranks” to protect one of their number who has broken the law and faces arrest, trial and punishment, it generates prejudice against the entire group. Only if they are willing to offer them up to the majority for equal treatment, will the majority look at them favorably as a minority.
You are absolutely correct. It’s just that people who “look like us” is socioeconomic in nature, not race related.
I, as an upper middle class caucasian professional have a heck of a lot more in common, “look more like” the upper middle class Asian and Indian professionals (immigrants, 1st and 2nd gen native borns) I’ve worked with and live near than a LOT of my fellow Caucasians.
I’m guessing that this “study” didn’t account for socioeconomic differences in the population groups observed ...