Honestly, I never expected to see such racial prejudice on this forum.
I don't think you can convincingly argue that this is about race. More just poor quality sanitation and hygiene in a given civilization.
Just read the thread. It's ridiculous and you know it. It is not as if most people in Western Countries have had hot and cold running water prior to 1940.
The attitude being expressed here is one of total misunderstanding of a) differences in climate between the Himalayas and India; resources availability such as water -- it is not like they bathed with heated water in India, Jeff, they used water as it was from wells and rivers, heated by the sun. Rivers in Tibet are extremely cold even in the summer.
Tibetans made regular use of hot springs where they existed. But most nomads lived in places far away from such volcanically active sites, herding yaks and sheep in the meadows and plains.
In places like Lhasa, the aristocracy could afford more regular bathing, just like in Europe, whereas poorer people could not afford it. Monks, when they bathed, only bathed twice a month.
Just as in Americas during the 16th, 17th, 18th, and much of the 19th century, regular bathing was regarded as unhealthy by much of the Tibetan population, farmers and nomads. It was only after Pasteur that bathing began to take hold in Europe and the US. And daily bathing was not common in the US until after WWII, and in parts of Europe, it is still not common.
Conditions in India are different -- it is hot, people are much hairier -- Tibetans have virtually no body hair in general.
In terms of sewer systems -- Tibet never had large populations apart from in Lhasa to deal with, so it was not an issue for most Tibetans when they came to India and Nepal. Population pressure by the Chinese have forced a lot of Tibetans away from their previous, lowland winter habitations, further, most of the pollution in Tibet has been brought by the Chinese, who now outnumber Tibetans in their own land by quite a bit.
So this conversation just strikes me as quite racist and narrow minded, with an absence of reflection on the real cultural circumstances, environmental and so on that, that we find these people in.