Take the Easter Island statues...there were obviously pacific islanders there....and it doesn't take too much of a stretch to think they went the extra 50 miles to the mainland. While logistically it seems close to impossible for an entire people group to migrate from Alaska to the Brazilian rain forests, even over 5,000 years time. It's possible, just not probable. Linguistically. the languages pretty much change completely once you're south of Mexico. Also, the Arawak languages are different from their Macro-Ge neighbors. I'm not saying that Algonquin has Norse roots, (although that is much more believable than Eskimos traveling to the Brazilian rain forest
). I only pretty much have anecdotal evidence, nothing concrete. Are The Guaraní from Africa? Doubtful. But if someone had a theory of Etruscan linkage to the Quechua, I wouldn't be shocked.