Looks bad

> while Japan shows the highest immigration levels among respondents, this is almost certainly due to the survey failing to reach the native Japanese population more than to any real demographic trend.

So we are admitting that the result is useless?

> despite being known as “a nation of immigrants”, only 17% of respondents from the U.S. have immigrant roots, versus 22% overall.

What was he expecting? 100%? From what I can find, US first born immigrant % is about 16%, so basically within the massive margins of error this thing has, this is a non result.

I don't think this thing is designed to elicit anything useful except vibes & giving the author a platform to pontificate.