Ok, I really can't understand the dynamics of this arrangement. Not with the info provided.
So you don't actually build this product or service, you're just a middle man? Why not just have the vendor include the missing piece?
I think crucial details are being lost in the vagaries.
Yeah it's a political tight rope. And you definitely wouldn't want to put in place any kind of horrific race or skin color requirements. You don't want some nightmare Nazi-esque racial fraction rule. Literally just, "did you have an ancestor from this country? Ok, you can come here." And yeah, if Norway decides to do that, then there will be some black Americans who happen to have some Norwegian ancestors who want to move there. And you have to be OK with that. There aren't millions of pure-blooded Norwegian Americans sitting around in the US eagerly waiting their chance to return to the homeland. There are instead people like myself. I have ancestors from all over Western Europe. The single biggest chunk of my ancestry is Norwegian, but that piece is still only like 1/4 of my ancestors. I have ancestors from Norway, Germany, France, England, Scotland, Wales, Ireland, and bunch of places I don't even know about. For all intents and purposes, my ancestry is just "generic white American." American was once called "the great melting pot" for a reason.
It's a political tight rope. There's a good argument to be made for it from a purely practical perspective. If immigrants are needed, why not recruit immigrants from countries that are most similar to yours culturally? Sure, Norway and the US aren't as similar as Norway and Denmark. But there aren't tons of Danish immigrants just waiting for a chance to move to Norway. And while not the same, Norway and the US are a hell of a lot more similar than Norway and Afghanistan are.
If Norway imports 100,000 disaffected politically liberal Americans, how many mosques do you think those new immigrants are going to want to build there? Most probably won't even be religious, and most of those that are will just help fill the pews of the already half-empty Norwegian churches. There's nothing wrong with building mosques. But again, we're talking about cultural friction here. Too much change too quick, and people feel like their culture is being replaced, and they start voting for reactionary politicians. One population intrinsically causes less disruption in integration than another. And if you need immigrants, why not select from those immigrants that can most easily assimilate into the existing culture? Normally this is a moot point. There normally isn't a potential reserve of millions of culturally-similar immigrants that European countries could draw upon. But right now, due to the political situation in the US, there actually are millions of such potential culturally-similar immigrants.
There's a good practical argument, but it's hard to make the case without making yourself sound like a militant racist.