Because as it stands right now, China continues to use slave or near slave labor. Because in China, labor has no rights to negotiate anything and if they go on strike, they are arrested and sent to prison factories to keep working. Because China furthermore primarly uses us as an economic colony, buying our raw resources and dumping their finished goods here. Because for the loss of a factory, there are losses by follow on factories that supported the main one and there are losses by secondary businesses that served the paid workers. Because there are losses in tax revenues, increases in expanditures in the form of retraining and welfare, because crime goes up, property values drop, etc, a whole ripple affect that devistates the very consumers who are supposed to benefit from saving a buck or two on Chinese vs American made products.
You're not directly answering my question. My theory is that capitalism, entrepreneurialism and free trade are the cures for those ills you enumerated. Do you disagree with that? Therefore, I don't see how trade with China and the development of an entrepreneurial middle class in China are harmful to America. Does economic competition with China scare you that badly? What do you propose we do about it?