Political allegiances are mutable things. The Dominion War rendered those former conflicts entirely moot by largely eradicating both sides. The Cardassian regime that the Maquis opposed no longer exists, and the Federation has had bigger problems these past few years, so it would've been counterproductive to engage in petty recriminations over things that are in the past. And the Federation in Gene Roddenberry's 24th century is supposed to be beyond acting for purely petty reasons like being "pissed off" by some past action. Especially in the face of the more urgent problems of the post-Dominion War era. The Federation is more about looking to the future than dwelling on the past.