A word of warning: These greetings will not do you any favors if you're in the midst of a job hunt or work in a conservative industry. Always remember your target personas. If there's a chance they won't appreciate your sense of humor, opt for a straightforward greeting instead.
I wouldn’t be offended or consider saying anything to anyone who included this in their out of office message, but even as someone who is in a religion that forbids use of electronics on most holidays, I still think this message is 1) TMI; 2) doesn’t convey what it needs to convey unless you are explaining that you don’t use electronics during holidays, in which case you can just include that you won’t be checking email without including the religious explanation; 3) would come across to me as inclusion of personal information I don’t need, which would therefore strike an unprofessional tone,and I wouldn’t understand why you felt the need to include that info. How about “I’m out of the office without access to internet or email until (date). If you need assistance before this date, please contact…” Like I said, I think your colleagues are overreacting, but in general I would advise to leave all personal information out of your auto-reply — vacation, medical leave, religious observance, etc. — people do not need to know why you are out.

That said, be careful with messages that are this curt. Make sure you're familiar enough with your audience — and your boss, for that matter — to know that this sort of out-of-office message will be met with a snicker, and not with annoyance.
5.) Sehr geehrte Kunden, unser Büro ist vom 24 Dezember bis zum 2.Januar nicht besetzt. Sie erreichen uns wie gewohnt ab Montag den 5. Januar. Wir wünschen Ihnen und Ihrer Familie ein frohes Weihnachtsfest und ein gutes und erfolgreiches neue Jahr.