Russia opposes the anglo-american world order which is the only imperialist power. Anti-imperialism is the most important aspect of the leftist struggle. Socialism is nearly impossible under the tyranny of the reactionary world hegemon as witnessed by the blockades and sanctions on Cuba, DPRK, and Venezuela. The delicate balancing act that China has had to play gets them labeled as "not really socialists." The carnage the imperialists in Libya, Argentina, and Indonesia because of their leftist leanings are what happen when you try and fail to build socialism under the imperialist gaze.