Example of my manly debating skills when up against a brutal enemy; myself:
Hey there x, you're wrong about Socialism in One Country being 'Stalinist.' First off, the first discussion within the Marxist movement on the subject can be attributed to Georg von Vollmar's 1878 book The Isolated Socialist State. Furthermore, your claims that Lenin rejected Socialism in One Country are baseless, as these glorious quotes will show:

"A United States of the World (not of Europe alone) is the state form of the unification and freedom of nations which we associate with socialism—about the total disappearance of the state, including the democratic. As a separate slogan, however, the slogan of a United States of the World would hardly be a correct one, first, because it merges with socialism; second, because it may be wrongly interpreted to mean that the victory of socialism in a single country is impossible, and it may also create misconceptions as to the relations of such a country to the others." (Lenin, V.I. On the Slogan for a United States of Europe. Lenin Collected Works, Progress Publishers, Moscow, Volume 21, pages 339-343. Sotsial-Demokrat No. 44, August 23, 1915, 1974.)

‘The development of capitalism proceeds extremely unevenly in the various countries. It cannot be otherwise under the commodity production system. From this, it follows irrefutably that Socialism cannot achieve victory simultaneously in all countries. It will achieve victory first in one or several countries, while the others will remain bourgeois or pre-bourgeois for some time’. (V. I. Lenin: C. W. Russ. Ed. Vol. 19; p.325).

Oh what's that? You say that Lenin was referencing the ultimate internationalism of the revolution whereas Stalin advocated socialism basically staying in the USSR? DAYUM SON, YOU FUCKED UP.

"But the overthrow of the power of the bourgeoisie and establishment of the power of the proletariat in one country does not yet mean that the complete victory of socialism has been ensured. After consolidating its power and leading the peasantry in its wake the proletariat of the victorious country can and must build a socialist society. But does this mean that it will thereby achieve the complete and final victory of socialism, i.e., does it mean that with the forces of only one country it can finally consolidate socialism and fully guarantee that country against intervention and, consequently, also against restoration? No, it does not. For this the victory of the revolution in at least several countries is needed. Therefore, the development and support of revolution in other countries is an essential task of the victorious revolution. Therefore, the revolution which has been victorious in one country must regard itself not as a self-sufficient entity, but as an aid, as a means for hastening the victory of the proletariat in other countries. Lenin expressed this thought succinctly when he said that the task of the victorious revolution is to do "the utmost possible in one country for the development, support and awakening of the revolution in all countries." (Stalin, Vol. XXIII: The Foundations of Leninism, p. 385)

(also you guys totally stole that smiley from SA but it is an awesome smiley so that's fine)