Geni stated: "As so many projects have learned so painfully in the last decade the English Wikipedia knows what they are doing."
Sorry, but that is not correct and Mitar's case is evidence of this.
Here we have an article on a cultural organization in Slovenia, which a cursory glance of Google shows is notable, being deleted outright by an admin who 1) does not speak Slovenian (and therefore unable to check sources) and 2) who likely did not do the same cursory glance that I did.
http://www.culture.si/en/Poligon_Creative_Centre is one awesome source that is not only reliable but also establishes the so-called importance of Poligon; i.e. "...the biggest artist run space in Slovenia."
Culture.si is an encyclopedia project of the Slovenian Ministry of Culture, devoted to the culture of Slovenia. If Culture.si, which is not editable by the public, has an article on an organization, then so should Wikipedia.
On http://www.culture.si/en/Culture.si:About under "Enhance Wikipedia! Reuse our content" (yes, it is CC licensed!) they state "Wikipedia in English has over 3 million articles but not many of them are related to culture in/from Slovenia."
This is, unfortunately, true. There is likely to be more articles on Game of Thrones, than there is on Slovenian culture.
As to the article in question, it is possible that it needed a little bit of cleanup; the solution in such instances would be put a cleanup/notability tag on it, and fix issues through collaborative editings.
If, at the whim of an admin, it was really required to be moved out of mainspace it could have been moved to Draft namespace, or even user space, with a note being left for the editor on their talk page.
This would be good practice, and it astounds me that after all the words written both on the project and on this very list, no-one has had the foresight to do one of the two above things for Mitar. Even now, he is asking on IRC for someone to provide him with the text that was deleted, and that request is being ignored.
Mitar, don't apologize for anything you have done on Wikipedia, or said on this mailing list, as you have shed some light on how Wikipedia fails on many levels with new editors.
Warm regards,
Ruslan Takayev