Some of these manufacturers are the importer of record but not the builder EX:Goodyear-Steelmark but they are still knockoffs built in China. In my warehouse we carry Bridgestone, Firestone, Gillette, Fuzion, Dayton and Peerless all from Bridgestone. Continental and General from Continental. Carlisle has tires built in the same factories as cheaper imports but their quality is better, I carry both. Some import tires are quality products and come at a premium price. The best advice I can give is find a dealer you can trust and let them tell you the difference in several brands. The highest price is not always the best quality and the cheapest not the best value. Just to keep it on topic, I don't know many dealers that are even open on BF because everyone is shopping for TV's, WIIs, Elmo and stuff.
P.S. some tires are still made in the USA, just ask.