This is NOT the original quote! it goes thusly:

"War to the hilt between communism and capitalism is inevitable. Today, of course, we are not strong enough to attack. Our time will come in thirty or forty years. To win, we shall need the element of surprise. The western world will have to be put to sleep. So we shall begin by launching the most spectacular peace movement on record. There shall be electrifying overtures and unheard of concessions. The capitalist countries, stupid and decadent, will rejoice to cooperate to their own destruction. They will leap at another chance to be friends. As soon as their guard is down, we shall smash them with our clenched fist."
-- Declaration By Dimitry Manuilski, Professor at the Lenin School Of Political Warfare in Moscow, 1930