EASA rubber stamping the FAA’s rubber stamping of Boeing is still EASA making a mistake just as much as it’s the FAA’s mistake. This has become a major public issue, bet the problems started when the aircraft entered service.
It's nowhere near as big of a mistake on the EASA's part. You don't understand how international regulatory and standards bodies interact with each other.
This is extremely bad. It it will be bad for any US regulated product used in EU markets like food, medical devices and equipment, pharmaceuticals, among others.