What do you mean ‘it’s working in Europe?
The dominant and official state religion in Europe is mostly Christianity.
[..]Europe
Christianity (Eastern Orthodox)
1. Belarus
2. Bulgaria
3. Cyprus
4. Georgia
5. Greece
6. Moldova
7. Montenegro
8. North Macedonia
9. Russia
10. Serbia
Christianity (Roman Catholicism)
1. Andorra
2. Austria
3. Belgium
4. Bosnia and Herzegovina (also Islam)
5. Croatia
6. Czech Republic
7. France
8. Hungary
9. Italy
10. Latvia
11. Lithuania
12. Luxembourg
13. Malta
14. Monaco
15. Poland
16. Portugal
17. Slovakia
18. Slovenia
19. Spain
20. Switzerland
Christianity (Protestantism)
1. Denmark
2. Estonia
3. Finland
4. Germany
5. Iceland
6. Netherlands
7. Norway
8. Sweden
9. United Kingdom (Anglican)
Mixed/Other
1. Albania (Islam and Christianity)
2. Kosovo (Islam and Christianity)
[..]