In the mean time, the trade between India and China goes back thousands of years with a common border. So, it is possible that the Native Americans could be the descendants of a group of Eurasians that moved on due to war.
Be careful with vague words like "thousands." India and China have only been civilizations, capable of engaging in activities like trade and war, for six or seven thousand years. (The exact figure eludes my Googling but I know it can't be more than eight thousand.) Before that they were Stone Age tribes like all the world was, except for a few people in Mesopotamia who got a very slight head start of maybe one or two thousand years. The big migration across Beringia was
six thousand years before that. At that time, the ancestors of the Chinese, Indians and Mesopotamians were nomadic hunter-gatherers with no permanent settlements, and their "culture" was limited to what they could carry, since there were no domesticated animals to help. There were no Jews or even Canaanites yet, no Israelite tribes to become lost.
If Indian refugees had come here ( or Jewish refugees for that matter), there would be more proof also, such as... art (elephants are hard to forget)
The aboriginal Americans hunted the mastodon to extinction. Are there no renditions of this animal in their art?
Bows & arrows did not reach this hemisphere until the last millennium.
Check me but I'm fairly certain they were invented here, as they were invented independently in many places, not brought by immigrants.
Being in the stone age, did not make Native Peoples 'uncivilized.'
Well actually it did, but that's not such an insult. "Civilization" merely means "the building of cities." It was a quantum advance in technology, just like agriculture, metallurgy, writing, engines, electronics and computers. "Uncivilized" people are simply people who live in farming or fishing villages (Neolithic) or nomadic hunter-gatherers (Mesolithic).
In the context of this debate, the key impact of the building of cities was probably the sociological one: for the first time people learned to live in harmony and cooperation with strangers. "Uncivilized" people are those who have never had a reason to learn to trust strangers, who regard them as competitors for scarce resources or as bandits who will steal their surplus wealth (stored food, clothing, etc.).
Yet civilization is a gradual process. Most of the native peoples of what is now the USA and Canada never quite got to the point of building true cities, yet many of them had made the necessary first step of establishing trade among their villages. This facilitated both overcoming the human ape species's pack-social instinct to drive off outsiders, as well as allowing the human ape species's strong curiosity to demystify the differences among them.
Gavin Menzies claims that a massive Chinese fleet of huge junks and support ships made a two-year circumnavigation of the globe, with extensive exploration of the Americas, nearly a century before Magellan and Columbus.
This is an extraordinary claim that requires extraordinary proof. Don't forget that China was several thousand years into the world's longest continuous civilization, with an elaborate government, an ancient written language, and plenty of chroniclers and historians. The Chinese of that extremely recent era (from their perspective) were described in written accounts as accomplished sailors (but from everything I've read ) they didn't much care to lose sight of the land and they were not noted for a driving curiosity. They could have sailed north along their coastline, past Alaska, and down the American coast--especially twenty thousand years ago when sea level was much lower--and indeed one of the not-at-all-crackpot theories competing with the hike across Beringia is just that. But if you want intrepid explorers you'd best look at the Polynesians, who settled both Madagascar and Hawaii.
Why is this in Comparative Religion? It seems like it belongs in the plain old Religion forum.
It started in Human Science or something like that. The first postings fit quite well in C.R. Six-page threads have a habit of morphing into something different from the original discussion.