If Poland wasn't so devoutly Catholic, they may not have been invaded at all.
Hmm well why did Poland beat the asses of Orthodox Russians & Protestant Germans & Swedes so often?
There were multiple times where Poland had beaten Russians & Swedes both at once.
Like in the Battle of Klushino & The Deluge.
I think it is more surprising that Poland even stood up to so many constant invasions & Having such a vulnerable area in the center of Europe.
Our Orthodox Cossack (Ukrainian) neighbors had similar circumstances of Invasions but they never had any power like Poland did
Catholics are generally more conservative I think on average than Protestants & Orthodox.
I actually think that may explain why Poland actually beat their asses numerous times in history despite being massively outnumbered.
The Catholic Holyleague with Jan Sobieski came together to beat Turkish ass!