In an ideal world it would have been nice to fight both tbh... Hitler was the immediate threat that needed to be dealt with though.
Both National Socialism and International Socialism ought to be opposed IMO, both have lead to millions of needless deaths.
Except that that wasnt true.
The Soviet Union was always a far greater threat than Nazi Germany ever was.
While fascist style movements were popular during the 1920/30's, I dont think there is any suggestion that individual countries nationalist movements were under any sort of direct control from Berlin as part of some sort of plan for global domination. By contrast international Communist organizations
were under direct control from Moscow and the
specific intent was to sow the seeds of revolution across western Europe, around the rest of the world, and even in north America.
Hitlers rise to power, regardless of the consequences, was actually very likely to have been a good thing. The alternatives would have been very much worse for the world.
In 1920's Germany it really was a toss up between the Communists and the Nazis. This of course is why The Nazi party gained the support of the middle classes and industrialists, and even the army (Which otherwise they would never have got) and why, as soon as he came to power, pretty much the first thing Hitler did was round up all the communists and their sympathizers and put them in concentration camps. They really were too much of a threat to his position to leave free to cause trouble.
A communist revolution in Germany, in 1930, would have been a catastrophe.
I am amazed that so many people seem to forget just how WW2 actually started.
In the immortal words of Basil Fawlty "You started it, You invaded Poland!"
Yes the Germans did invade Poland.
But the Soviet Union did too! They were allies to begin with.
And the Soviets were every bit as savage as conquerors as the Germans were. Probably rather more so in fact, at least in the early years of the war. (Katyn Massacre anybody?)
Indeed they carried on being allies until
well after the Battle of Britain had been won (Just) and the Blitz era was over. And yet, for some unfathomable reason. while we declared War on Germany, we never declared War on the Soviet Union.
Had the Communists come to power in Germany in 1930, there would probabally still have been an alliance with the Soviet union, there would probabally still have been an invasion of Poland, and the combined forces of Germany and the Soviet Union would have swept across western Europe in a wave of destruction that would have resulted in the deaths of probabally around 1/3 of the population (Historically a typical figure for Communist revolutions. From 1920's Russia to 1970's Cambodia).
It is alleged that at the end of WW2, Churchill was heard to say, "We Killed the wrong Pig". I do not believe that there is any proof in this, but the sentiment is there.
In some ways we should be grateful for Hitler and the Nazis. Even if they had won WW2, the consequences would have been far less severe than if they had never existed in the first place.
Had Hitler stayed in art collage, the world today is likley to have been a far darker placed!