But I think anyone who holds this attitude is insane. There are no ideals if you are dead.
Only if one thinks in purely selfish terms... Setting an example through suicide is pretty common, especially if suicide is the only plausible future prospect anyway!
The Maquis were Federation citizens. Were the Cygnians Federation citizens?
We never learned of a mechanism by which a bunch of colonists from Earth would not
be Federation citizens - even if said bunch left for their destination before the UFP was even founded. Conversely, we never really heard it established that the DMZ colonists would all be Federation citizens, either by default or by later agreement; all we heard that some bunch Eddington called "us" was considering secession but never got around to it. So, no telling if there really was a difference there.