What good is the truth if it spins the quadrant into war?
From who? Would the Federation start a war over the actions of a rogue element? The Cardassians would be in no position to start a war. It was the Federation that is the wounded party here. All that would need to happen is the President denounces the extremists. And says they do not represent the Cardassians as a whole. That would make the Caredassians actually indebted to the Federation for taking the high road. Such a thing would strengthen the allaince. "One of youe own killed the President, but we will look past that and not blame you at all."
When the Typhon pact looked guilty would be a more dangerous flashpoint for war.
Though I suspect the Cardassian angle was another cop out. Next novel we will have new suspects. The Ferengi framing the Romulans framing the Cardassians framing the Tzenkethi