Likewise, why should America be able to override European laws regarding European users in Europe? It's all about jurisdiction. Do business in Country X? Then

Likewise, why should America be able to override European laws regarding European users in Europe? It's all about jurisdiction. Do business in Country X? Then you need to follow Country X's laws. Same as if you go on vacation to County Y. If you do something that is illegal in Country Y while you are there, even if it's legal in your home country, you still broke the law in Country Y and will have to face the consequences.