Excuse me? Now who's wanting other countries to fight their wars?
You ask who? Well - of course Great Britain wanted Poland to fight Great Britain's war for preserving their Colonial Empire from the threat of growing German power which could threaten the Great Britain's supposed (we can argue if it was still a fact in 1938) world dominance.
Not otherwise.
As you noticed - Poland was "playing buddies" with Germany (well, in Poland that was called
"policy of balance between Germany and Russia" - which was consistently carried out by Polish Foreign Affairs Minister Joseph Beck - rather than "playing buddies" with either Germany or Russia).
Poland had non-aggression pacts both with Nazi Germany and with Soviet Russia - which doesn't mean it was "playing buddies" with either.
It turned out how good "buddies" Poland was with Germany when Poland firmly rejected Germany's offer of joining the Anti-Comintern Pact...
All the friendly gestures before that on the part of Poland were just diplomatic courtesy and part of that policy mentioned above.
which it was, consistently, for almost the entirety of Nazi rule in Germany up to the outbreak of WWII
Not up to the outbreak of WW2.
The Polish-German relations terribly worsened already at the beginning of 1939 and especially since March 1939.
"freaking Polish dictatorship buddying up with the Nazis caused its own damn problems".
Absolutely no. It was Great Britain & France which allowed Germany to regain its former military power. British pro-German attitude and appeasement made it impossible to continue to extort from Germany observing provisions of the Versailles Treaty - all of which Germany broke in Britain's own backyard.
If any own problems Polish Rydz-Smigly dictatorship caused - it caused them by opposing Germany since early 1939 onwards.
Czech leadership was more realistic in one thing - that they decided to succumb to Germany without trying to resist. But on the other hand Czechs had no British and French guarantees - while Poles had them and thus deluded themselves with empty promises of help from France and Britain.
By surrendering to Germany without any resistance Czechs avoided much of the destructions and civilian casualties that Poland suffered.