You cannot generalise to ALL European countries. Look at the UK:

+ Largest Mandir and Gurdwara outside of India [well since the two new Mandirs were built in the USA, I don't think the Mandir claim is still true].
+ In many boroughs like the one I live in, schools have the following days off: Both Eids, Diwali and Guru Nanak's birthday.
+ My secondary school ALLOWED shalwar khameez as the uniform as long as it was in school colours
+ My secondary school never imposed any regulations on religious headwear [they could have any colour, even Gucci logos which many Muslim girls had on their scarves - I disagreed with this].

I do agree that Europe doesn't really follow religion and doesn't care about it, but I still think many Europeans respect religious followers and their free will to follow any religion.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/interfaith-dialogues/1212-america-vs-europe.html
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=1212

~CaramelChocolate~