I grew up hearing this story (it's famous in India), but it's not applicable to the current immigration crisis in Europe / US.
For one thing, the Parsis were lobbying to be allowed in. Europe and US are in need of immigrants due to shrinking, aging populations as their populations stop having kids. Their economies require a working class that they need to import. So immigration bans aren't really an option. And because the immigrants have some leverage in this situation they don't have to lobby like the Parsis did.
In the other case: refugees. This is a policy Europe and the US (and by extension the rest of the world adopted due to their negligence in WWII and the need to resolve that conflict post-war. It's another situation where the immigrants / refugees have the leverage and do not need to lobby. The US and Europe could revoke this policy, but they will suffer in the world if they do.
In contrast, the Parsis and the king in whose kingdom they moved to did not have this backdrop, and there was no need to take them in nor any pre-accepted agreement to amend. Additionally imagine if the Parsis had, 3 or 4 centuries later become a "problem" population in India in spite of the story. It's not as if that story alone kept the entire community from ever committing crimes or otherwise changing the fabric of society. In that scenario, it would not be possible to then remove them once they have moved there for generations. The same thing is true in Europe and North America.
For one thing, the Parsis were lobbying to be allowed in. Europe and US are in need of immigrants due to shrinking, aging populations as their populations stop having kids. Their economies require a working class that they need to import. So immigration bans aren't really an option. And because the immigrants have some leverage in this situation they don't have to lobby like the Parsis did.
In the other case: refugees. This is a policy Europe and the US (and by extension the rest of the world adopted due to their negligence in WWII and the need to resolve that conflict post-war. It's another situation where the immigrants / refugees have the leverage and do not need to lobby. The US and Europe could revoke this policy, but they will suffer in the world if they do.
In contrast, the Parsis and the king in whose kingdom they moved to did not have this backdrop, and there was no need to take them in nor any pre-accepted agreement to amend. Additionally imagine if the Parsis had, 3 or 4 centuries later become a "problem" population in India in spite of the story. It's not as if that story alone kept the entire community from ever committing crimes or otherwise changing the fabric of society. In that scenario, it would not be possible to then remove them once they have moved there for generations. The same thing is true in Europe and North America.