It's a bit of an oddball time to call for peace when the war itself hasn't really been played out yet.
Even during the run of TNG the Alliance itself was rather shaky and one-sided with pretty much all the concessions being given to Klingon sensitivities, and all that effort didn't seem to do anything but lead the Klingons to holding the Federation further in contempt.
And perhaps that was the problem with the Federation-Klingon Alliance... no real sharing of values,and no logical reason to keep them together.
What about the time when they needed the Fed to act as arbitor of seccesion.
What about all the hybrids out there like B'lanna Torras.My Fed tac has 15% Klingon in her.