It’s all geopolitical;
http://economictimes.indiatimes.com/news/defence/russia-china-and-pakistan-for-flexible-ties-with-taliban-india-ignored/articleshow/56233609.cms
Russia, China and Pakistan for flexible ties with Taliban ...
Now, I don’t know if this is true but if it is, I heard Russia is a bit afraid of how Afghanistan is going and that ISIS could take it over, so? Taliban better than ISIS? I guess is what they are looking at. Taliban, definitely Sunni as well.
If Russia wants Afghanistan, they can have it.
Good luck with all that.