They aren't that crazy, where else would you build them... France, Italy? German labor laws are pretty average for western Europe.

You need stability, skilled and productive workers and it wouldn't hurt to have a chemical industry, Germany has all that.

USA (and yes, I know they are building some here already). Maybe UK as well.

Neither of these are in the EU and won't solve the problem for the EU, they'd still be dependent on other countries. The point is to bring the production to the EU.