China has a complete disregard for environmental stewardship, practices near-slave labor, artificially suppresses currency value to the detriment of competing economies, and does a whole host of other things that justify consumers saying "no thanks" to products made there.
Metzeler is at fault for that?
Germany, along with other Western nations, is not perfect. However, when you buy a product designed and manufactured in those places you can feel fairly confident that the aforementioned problems will not be fed by your money.
The perception of effort put forth by the factory line worker is not the only thing, or even the most important thing, that people take into account in a scenario like this.
Are we all Archie Bunker sitting in a green armchair? No....so don't be him yourself when you're quick to assume you know everyone well enough to lump them all together as KKK members.