The US FDA's position on this is well-reasoned. US eggs are generally vaccinated against salmonella and washed. The vaccination part isn't mandatory but it is

The US FDA's position on this is well-reasoned. US eggs are generally vaccinated against salmonella and washed. The vaccination part isn't mandatory but it is cost effective so producers do it anyway. The effectiveness of the salmonella vaccines is middling at best and unpredictable -- eggs are still a major source of salmonella outbreaks in Europe. The benefit of washing eggs versus vaccines is that it produces a reliable result whereas the vaccine effectiveness has high variance. Also, this isn't a "European" thing, some parts of Europe also wash their eggs for the same reason. The US only started washing eggs in the 1970s, in a successful effort to reduce salmonella incidence. Salmonella vaccines that work consistently and effectively in poultry are still an active area of research, it isn't a solved problem. Regardless of what you believe, US food regulations regarding bacterial contamination are significantly stricter than Europe outside of Scandinavia. There are a number of well-known cases where European producers modified or upgraded their production processes to meet US sanitary requirements to enable exports. Scandinavian countries notably don't have to do this because their standards are similar to the US. There may be other dimensions of food safety that are better in Europe but mitigating bacterial contamination is famously not one of them.