It’s not a “whistle.” Culture is virtually co-extensive with ethnicity in most places in the world. I come from a country whose name literally just translates into “country of $ethnic_group.” To the point where the largest country in the world, China, has lumped myriad different populations into the ethnic grouping of “Han Chinese” to cultivate cultural uniformity.
> a country whose name literally just translates into “country of $ethnic_group.”
FYI, this is the case with Denmark as well (as long as you permit Dane to be an ethnic group)
Trusting and gullible alike also means easily exploitable, especially when coupled with hospitality which (believe it or not!) is, or at least was, a core value in DK. This whole line of reasoning has been very visible for the average Dane throughout the past 3-4 decades, as non-Danes have aquired larger shares of the general residency.
The general rule of "When in Rome, do as the Romans do" has not really been observed at all by a significant fraction of those visiting or relocating to the country. And the Danes do notice that, although a fraction of the populace choose to wear the rosy-coloured glasses at all costs because principle, culture, tradition (culture matters a lot in DK, the culture is fairly conservative even though most Danes will deny that they themselves are).
The "trust" that non-Danish media likes to herald now is just a shadow of what it was, and it is steadily albeit slowly on the decline - especially in Dane-foreigner relationships IMHO.
If you dislike the facts, feel free to dismiss this as anecdata.