And even when Asians ate non-fermented soy products like tofu, these were eaten as side dishes. The main food in traditional Asian diets has always been grains such as rice, millet, barley or wheat.
And the second main food has always been vegetables. Beans, including tofu and fermented soy products, never formed the main part of typical Asian diets.
You can also take a look at this:
Myths and TRUTH about SOY
Ok, first off, I would request that your research be via mainstream publications, preferably one I can find through PubMed, not some dubious website. As stated in the defunct Evolution/Creationism forum, peer-reviewed journals by mainstream scientists, please.
And second of all, I grew up in a Chinese household. I eat Chinese food at home. I visit my grandmother in Sichuan, China.
I also shop with my parents at Chinese grocery stores. And one thing I noticed is that bean curds and bean based products are an integral ingredient in many Chinese dishes. The pastries that are traditionally ingested during Chinese New Years, and other major holidays/events, are bean based paste. Probably half the products my parents buy have some bean derivatives to it.
Tofu, in it's myriad forms, are a significant part of the Sichuan, if not Chinese diet (although Sichuan is one of the most populous provinces in China and Sichuan dishes are commonly cooked in other provinces).
I have a understanding of what the 'average' Chinese family eats and soy and bean are a major part of the Chinese diet. My entire extended family are fed on soy based products as a major component. The reason is traditionally tofu and beans are cheaper than meat in China.
Rice is the main staple, eaten as Europeans may eat their bread, and vegetables are eaten as major side dishes, but tofu and beans are made into a significant amount of Chinese dishes. It is commonly added into many dishes which may not be called 'tofu'. My dad cooks it into vegetable dishes, my mom used to add it into steamed fish.
As for beans....it IS a major source of protein for most Chinese when my parents were growing up because meat used to be very, very expensive. During the famine in the 60's, my dad only ate meat twice a year.
Do Chinese people eat a lot of soy based products? Yes. Do we eat a lot of beans? Yes. Are Chinese men losing becoming infertile? Hmmm, the government perhaps wishes sometimes.