As compared to nations that did much less in Iraq, Poland has a right to be pissed with what they've got. Poland can be our best ally in the EU, and we need to do all we can to see that the relationship doesn't grow sour. "Disenchantment" on their part means an opportunity for the French to expand their European sphere of influence.
Respect to the Poles for their engagement in Iraq but Polands future simply is the EU (economicaly, geographicaly, culturaly, same interests). In 15 years when the parents tell the young Poles about the Iraq war the youngsters will answer "that were different times".