Have any European groups been historically uninterested in immigrating to America?

ETA: found the email for my local Immigration Office, I’ve asked them re. “Puerto Rico vs. other US locations”.

From the horse’s mouth:

Peru and Chile are the only (non-EU countries) that have a special treaty making it easier to move to Spain to work. The rest follow the general procedure.

The reason you don’t have a lot more recent Irish immigrants is because it is far easier for a young Irish person to get into Canada, Australia, and of course the UK than the US.

As far as I’m aware you have to have been born in NI to qualify.

Are you actually trying to be a dick?