That’s only if things actually stop at half of Poland, which is hard to imagine with a facist state. You kinda need (plausible) external enemies to keep your power.
It also just sets a bad precedent to let the bullies have their way. Though I’ll admit that it’s questionable whether it was worth it in hindsight, we have only one possible branch of history to compare.
The topic of discussion isn’t whether to invade! It’s whether there was a realistic threat of Germany invading either all of Europe or the entire world, and separately whether the allies were in fact practicing what they preached. That is what I was replying to in the GP, which I explicitly quoted! The goalpost move was the topic being changed from world invasion to Poland invasion.
Oh that’s fair, in my last comment I said “invade” which was careless word choice. What GP said and what I was reacting to was “conquer”, as in invade and then continue to occupy after the war concludes.
The France and Britain invasions were pretty straightforwardly defensive actions by Germany. They both allied with Poland and when Poland was invaded (an aggressive act by Germany) they declared war on Germany. What evidence is there to suggest that Germany would still have invaded France if France and Britain had simply abandoned Poland? Note that I’m not asserting that they “should have” abandoned Poland, just that the “we’ve got to stop them before they conquer the whole world” is almost always a bogeyman.
This line of reasoning is even more revealing when you realize how the western allies dropped Poland like a bad habit at the end of the war. The Polish government-in-exile that fought with the western allies never regained control of the territory of Poland -- the current Republic of Poland is not a continuation of the pre-war government or the government-in-exile. One could make the argument that the poles were just a convenient excuse for Britain and France to enter and expand the war.
Are you suggesting that the west should have gone further and declared war on the USSR after Germany's defeat, such that, it is consistent with the view that Poland should exist with its pre-war government, otherwise, the governments of the west are just hypocrites? Was the cold war not hot enough such to meet this bar? These glancing apologies for Germany's actions in WW2 seem ludicrous.
It also just sets a bad precedent to let the bullies have their way. Though I’ll admit that it’s questionable whether it was worth it in hindsight, we have only one possible branch of history to compare.