It's a mistake for Russia to even support and back you during the Soviet day. You are a cautious and pretentious country. If Russian is reading this, you just expose yourself.
Russia fate is not at stake? Russia is being entangled if they didn't step in to intervene in Crimea. I better not see a single word from you in here. You are not intelligent enough to analyze geopolitical game being played out.
NO, you are wrong. Your assessment is incorrect about Russia foreign politics.
as for the Crimea, actually Vietnam cannot afford to support openly Russian imperialism, because in doing so, China would be encouraged to copy Mr Putin´s way and annex Vietnam (so perhaps in private talk we say the Russians it is ok you can do whatever you like, but pls don´t drag in Vietnam, unless you want to share the booty with us).
Russia seeks a permanent marine basis in Vietnam, most likey in Cam Ranh bay. The aim of Mr Putin is to get access to ASEAN market and counter America and Chinese politics and military influence in SE Asia. Already, Russian warships have priviledged access to Vietnam ports. Now they just want more. As far as I know Vietnam is still undecided. China is the key here, and how the VN government assesses the threat from China.
The Soviet Unions is another story. We were brother in arms and allies dated back to 1950. The Soviets had military basis in Vietnam and provided tens of billions USD of aid to Vietnam. Yes, the USSR supported Vietnam until it collapsed. As for imperialism, you should read more about the invasion of the Soviets into Afghanistan in 1979, the year then China launched an invasion into Vietnam. As far as I know Vietnam was very upset, that the Soviets started the war at another front instead of North China.
Usually Russia and China are competitor on international world stage. You both only cooperate when interests overlap. You both are not brother in arms.
Vietnam foreign policy often bases upon pragmatism, not blinded ideology.
Who is friend and supporter of Russia in SE Asia? It is Vietnam. Without Vietnam, the Russians have nobody in the region.