But it's true.
They were dragged into a trap. The Germans of Danzig were persecuted by the Polish Government, and the Nazi Government invaded Poland.
Even before the rise of Hitler, the Germans had misgivings about the newly-redrawn border with Poland, but they weren't in much of a position to do anything about it. Hitler wanted to change that situation and build up his military forces to try to get back territory which had been lost in WW1. Plus, they were worried about the USSR, which was also building up their military forces, as were the British and French. An arms race was in full swing.
I suppose a more moderate but anti-Soviet government in Germany could have probably made some kind of pact with Poland for joint defense against the USSR. They might have also included the Baltic Republics and other European states who were afraid of the Soviet Union. They wouldn't have to invade or take over any countries, as they could have formed a joint defense and trade pact - something not unlike the EU is today. The governments of countries bordering the Soviet Union would have likely willingly gone along with it. It would probably still entail a re-arming of Germany and building up their military, but with a more moderate government in power, they would have also achieved greater respectability and be treated as a first-rate power by the West, which also would have an interest in supporting a European anti-Soviet alliance.
Under those conditions, they probably could have made a deal over things like the Danzig corridor. Such a thing wouldn't be such a big deal between pals, but if one side turns out to be led by a gang of aggressive, violent, mendacious, treacherous, murdering, genocidal miscreants, then there are bound to be problems.
It actually put the West in quite a bind, since they had no automatic reason for going against the idea of a re-armed Germany as a buffer against the Soviet Union. But they just couldn't deal with a raving, mentally unstable lunatic. They saw Hitler as the more immediate threat than Stalin, who they also saw as a threat, except more as a long term threat.