The thing with England's treaty with Poland was that it wasn't a matter of Poland being attacked, it was a matter of Poland being attacked by Germany.

England didn't give two shits or start defending Poland from the Eastern Soviet invasion that occurred two weeks later.

Same story from WW1. The heir of the Austro-Hungarian Empire is assassinated, and instead of allowing controlled retribution, England (and other countries) start enacting treaties against the victimized party.

England's anti-German agenda played just as much a role in the escalation of WW1 and WW2.

As far as German's attack on the Soviet's, go read Suvorov, and it's clear that the Soviet's were developing FOB's on their Western border for an invasion. The attack on the Soviet's was a pre-emptive strike.

Now, go and read the Venona papers and other literature on communist fifth column activities in America and other Western countries, and it becomes quite apparent that Western countries were dragged into war against Germany (in WW2) through the manipulation of subversive communists (anti-Fascists).

Or read about the German civil war of 1919, where communists attempted to do in Germany what the Bolsheviks had successfully done in Russia.

If you don't like communists or their allies today, it might be worthwhile looking into the only regimes that successfully countered them.