Russia sets the bar for Turkey to join SCO: quit NATO.
Putin's special envoy to SCO explained it as that candidate countries cannot be in conflict with any current SCO member, cannot have ongoing external conflicts either, not sanctioned by UN, and not a member of international groups that are hostile to any current SCO member. He specifically named NATO as such international group which has declared Russia as its number one enemy.
But by these conditions, how were India and Pakistan allowed to join then?
俄外交部:土耳其必须符合加入上合组织标准,不能是北约成员国
据俄罗斯卫星通讯社9月20日消息,俄罗斯总统上合组织事务特别代表、俄罗斯外交部无任所大使巴赫季耶尔∙哈基莫夫表示,土耳其应符合加入上海合作组织的一系列标准,不能是北约等集团的成员国。
哈基莫夫说:“我们有接纳新成员的条例,其中规定了一些标准,包括属于欧亚地区国家,积极保持与上海合作组织成员国的外交、经贸和文化联系,既与上海合作组织成员国没有冲突,也没有卷入外部冲突,不受联合国安理会制裁,同时也不参与敌对或针对上海合作组织成员国的活动和集团。”
哈基莫夫称,土耳其是北约成员国,北约“宣布俄罗斯不仅仅是敌人,而且是头号敌人”。
My guess is that the SCO rules are and always have been in flux. Lots of exceptions can be made when the strategic calculus is overwhelmingly in favor. Turkey's case is not one of those. India and Pakistan are both nuclear powers with huge populations. Pakistan has close ties to China and India has close ties to Russia. I imagine that is the reason.