n the other hand I repulse the idea that a new war is inevitable; still more that it is imminent
This statement expresses, they may believe that there are ways to prevent conflict and promote peace, and that it is important to avoid a mindset that assumes war is inevitable or imminent.
where Communism is in its infancy,
This metaphor is showing that communism is just in it's beginning stages at this time.
An attempt is being made by the Russians in Berlin to build up a quasi-Communist party in their zone of Occupied Germany by showing special favours to groups of left-wing German leaders.
It is worth noting that, the attempt by the Russians to build up a quasi-Communist party in their zone of occupied Germany by showing special favors to left-wing German leaders suggests that they were trying to promote Communist ideology and solidify their control over the region while also undermining the legitimacy of the Western-backed government in other zones of Germany.