That'd be interesting, just needs a POD for why they're emigrating in large numbers but didn't OTL. (And when that happens would affect which states get the large established Moroccan communities)
Well, IOTL, Moroccan settlement of the current United States began Estebanico Al Azemmouri (also called
Estevanico), the first African to explore North America- a Muslim Moroccan of
Gnawa descent, who participated in
Pánfilo de Narváez's ill-fated expedition to colonize
Florida and the
Gulf Coast in 1527. IOTL, only Azemmouri and three of his comrades survived during the long and arduous 5,000 mile journey from Florida to Texas; finally encountering other Spaniards near Sinaloa, Mexico, in 1536, then travelling to Mexico City, arriving on July 25, 1536. He subsequently accompanied
Marcos de Niza as a guide in his search of the fabled
Seven Cities of Cibola ahead of
Coronado, and according to Marcos de Niza's account, was reportedly killed along with the large group of Sonoran Indians who'd become his personal entourage when trying to make contact with the
Zuni village of Hawikuh (though modern historians believe that the Zuni did not kill Estevanico, but rather he and his friends remained among the Pueblo peoples rather than returning to the Spanish and being enslaved once more, with the Sonorans helping him fake his death so he could regain his freedom, and official account of his demise providing the cassus-belli for the
Tiguex War). And it's also worth mentioning that he first
American Jew to serve in the Senate was
David Levy Yulee, who was of Moroccan descent and served as
Florida's first Senator from 1845 to 1851 and again 1855–1861; with the Moroccan American community having historically been most significant in Florida, and comprised predominantly of Sephardic Jews.
Thinking about it though, the Jews' migration to America began with the
Alhambra Decree by Spain's Catholic Monarchs, in 1492; but the Portuguese equivalent, issued in 1496 by Manuel I, was an edict of expulsion for both Jews and Muslims. Might the solution be having the Spanish issue an edict of expulsion for Muslims as well, or forcibly exile them to penal colonies in the New World? For instance, after King
Philip II directed Moriscos to give up their Arabic names and traditional dress, and prohibited the use of
Arabic in 1567, there was a
Morisco uprising in the
Alpujarras from 1568 to 1571, and in the years from 1609 to 1614, the government
expelled the Moriscos, with the historian Henri Lapeyre estimating that this affected 300,000 out of an estimated total of 8 million inhabitants, and some more recent estimates going up as high as one million. IOTL, the great majority of these were transported to North Africa, though at least 5% were sent over the Pyrenees Mountains to France (with the French then sending most of them off to the port of Agde).
But what if they'd followed the suggestions of the Archbishop of Valencia,
Juan de Ribera, who considered the Moriscos as universally heretics and traitors, and who played in instrumental role helping The Duke of Lerma (who'd made several early proposals to
King Philip III to banish or otherwise end the Morisco problem, and even recommended
genocide) to eventually convince King Philip III to expel the Moriscos in the first place? Not only in order to confiscate the assets and properties of the Moorish population, thereby providing a dramatic one-time boost to the royal coffers, but to also enslave all of the Moriscos for work in Spain's galleys, mines, and abroad, since he could do so "without any scruples of conscience" (as well as lobbying against the exemption from exile for Morisco children under the age of 4, which was later increased to the age of 16- with Ribera insisting that at the very least the children should be separated from their parents, enslaved, and Christianized "for the good of their souls")?
These proposals were rejected IOTL, but in an ATL where they weren't, a good portion of the Spanish Moriscos would've been enslaved and shipped off to exile colonies in the New World instead of being ferried to North Africa- with Florida being the most likely to be earmarked for this purpose, but with Texas, Arizona, New Mexico and California also being distinct possibilities as well. And if Spain had expelled the Moriscos, or any significant percentage of them, to North America rather than North Africa, then you'd certainly have wound up with large, well-established Moorish communities, engendered by the Spanish being ever-so-slightly LESS tolerant of Muslims ITTL than they were IOTL...