...just like this one is being closed and moved to the Questions forum.
To answer the question, there are no political motives but purely editorial ones. If everyone posted everything in one forum then it would become very difficult to scan through and it becomes cluttered.
I try to keep Rumours & News (the original PPRuNe forum) to precisely that. Occasionally I may leave something in which is not quite in the category of news if it is what I consider an interesting topic that may not have been covered before.
Many people are new to this website and don't realise that many topics have already been discussed at length. Most of the time a closed topic will have a pointer to where it has been moved or why it has been closed. Occasionally I just despair and close one without an explanation because it's just not worth getting into a slanging match and the content is usually enough to indicate why to most regulars.
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Capt PPRuNe
aka Danny Fyne
The Professional Pilots RUmour NEtwork