I sympathise with you. I'm not seeing a solution outside suspending this moronic minority's right to make decisions for themselves and their children or leaving the parts of the country that have chosen this fate to their own devices. In that framing, the question is which is leakier: suspending civil rights or literal viruses?
France, Germany and Greece are included not just the Eastern countries.
https://pmc.ncbi.nlm.nih.gov/articles/PMC11588923/
While it’s easy to blame anti-vaxxers, a large contributor are people who saw waning immunity and immigrants from countries with poor immunization rates.
Even with 100% immunization youll still have outbreaks occasionally as people come in and out and the vaccine just doesn’t “take” in some small percentage.
Thus, number of measles cases doesn't tell the full story. One also needs to look at far rates of hospitalizations and complications.