Value, respect, and strive for diversity in editors

Just as an additional note, from my own experience:

While the German Wikipedia has reduced stubs or extremely weak articles, it should be noted that it has a serious problem with page removal (a) in terms of procedure, it has become abused to display power to a degree that is almost absurd (b) in terms of content, it has led to the exclusion of a lot of pages that were deemed not relevant by wikipedians due to a lack of understanding for its area of knowledge.

By consequence, the German wikipedia has lost a lot of serious but casual contributors and many people are now scared to be treated like an idiot. The policy to review changes before they are shown to the public has further decreased motivation since it breaks up the direct editing loop and the joy of fixing errors. I know some editors who only use the English wikipedia now.