Well, you should understand the nature of the 2nd World imperialist war. I am not a left communist who see the USSR as an imperialist power, and I support Trotsky's position of the unconditional defense of the USSR. However, apart from the question of the USSR, the 2nd World War was an inter-imperialist war from which the international working class could get nothing. The claim of the "war against fascism" is a pure myth; in fact the "democratic" imperialist governments were accomplices of fascism. For example, Churchill, Roosevelt et al, who knew very well about what was happening in the Nazi death camps, did nothing to stop the Holocaust, and even refused all the German government's proposals to free them by the hundred thousand, because the transporting the Jews would hinder their war effort. There is no enough room for writing about the crimes of "democracy". As Trotsky clearly stated, the only policy towards the 2nd World War was revolutionary defeatism -- turn the imperialist war into civil war against the bourgeoisie.