The Turkish PKK, known for its armed struggle for an independent Kurdistan, initially (1970s) described itself as communist, and more recently still rather radical as communalist. It is designated as a terrorist group by the USA, the UK, Japan, and others, but not by Russia or China. Rather, Vladimir Putin notes that the Kurdish organisations YPG and YPJ are instrumental in fighting Islamic State (but the UK is supporting those as well).
Apart from the pragmatic note that YPG and YPJ have had some success against Islamic State (that even most of those who list PKK as terrorist recognise as the worse evil), how is the relation between the various progressive Kurdish political and militant organisations on one hand, and Russia on the other hand? Considering its historically communist alignment, one might expect friendly ties between Russia and Kurdish groups. Are there such friendly ties?