Yes, the Levantines (Syrians and Lebanese) are quite successful throughout Latin America. Does this mean that the hordes of mestizos that form the bulk of Latin American immigrants are a genetic and cultural asset
to the US? NO.
As the descendants of great civilizations (Maya, Inca, Aztec and Spanish) I think they have the "genetic" capacity to form great civilizations again. "Culturally" they'll have, I hope, enough resilience to throw off the failed and fetid Socialists they disastrously elected, and get back on track with better, freer political and economic institutions.
In their homelands. México libre. Centroamerica libre. El Caribe libre.
Not in Texas and El Norte.