The thing about self-determination is that it requires that one not lose or abdicate the responsibility to determine one’s self.
This means participating in a robustly democratic civil society, not being subject – or subjecting one’s self – to an authoritarian, let alone fascist, party or government.
This means that yes, you can recognize a people’s right to self-determination without accepting all outcomes of that process. Not all outcomes reflect actual self-determination.
We must build a shared society that facilitates our actual self-determination, as individual people and as groups.
(This will require a new story.)