Do you really want to know what Ben Franklin penned regarding who should immigrate to America and who should not?
Like this one about Germans?
Advertisements intended to be general are now printed in Dutch and English; the Signs in our Streets have inscriptions in both languages, and in some places only German: They begin of late to make all their Bonds nad other legal Writings in their own Language, which (though I think it ought not to be) are allowed good in our Courts, where the German Business so encreases that there is continual need of Interpreters; and I suppose in a few years they will be also necessary in the Assembly, to tell one half of our Legislators what the other half say; In short unless the stream of their importation could be turned from this to other colonies, as you very judiciously propose, they will soon so out number us, that all the advantages we have will not in My Opinion be able to preserve our language, and even our Government will become precarious. @The Support of the Poor - Benjamin Franklin 1753
Or was there some other you had in mind?