The Overlord wrote:
Removing the aboriginals from their new planet was done to appease a morally repulsive dictatorship who had no real desire for peace with the Federation.
Some folks thought the same about the Klingons and yet a hundred years later a fragile peace between the Feds and the Klingons existed.
Nobody in Starfleet believes that the Romulans have a real desire with peace, their agenda is unlimited expansion. Nonetheless a peace treaty between the two powers exists and it is worth to fight for any time.
Playing the "oh my God, they are wicked fascists, no peace with them" is something I agree with if we talk about intraspecies conflicts, i.e. our really existing world. Not so in the case of interspecies conflicts, here such rhetoric is plain warmongering. Plenty of nasty folks out there, you can't wage war against all of them just because you got a moral boner.