If you read and believed everything on every Islamic site out there, the only thing left for us that would be halal is water.
Soy milk - never heard of that being haram.
Soy sauce - some are fermented, so some can have a 1-2% alcohol content.
Someone somewhere is constantly figuring out a most convoluted reason why something is haraam. Just ignore these idots. Soya milk is good for you, both men and women.