Where's this Romulan thread? It seemed pretty obvious in Unification that the people were scared of being disappeared for being disloyal. If they approved of Romulan militarism it's because they're terrified of being seen as not approving it.
It seems like rule in the Dominion follows the simple rule: Don't get too powerful, don't cause trouble, and you never see us. Bother us in any way, Jem'Hadar make you go boom. It's clear in several episodes that there is free commerce within the Dominion, and the Dominion probably encourages things like the Tosk hunt like the Roman colliseum. Social freedoms and economic freedoms, but no political freedoms and constant fear of seeing the Jem'Hadar on your doorstep.