Is "The Plague" considered an allegory of the struggle against upcoming extremism? While reading it I saw some parallels with occupation: people trying to esca

Is "The Plague" considered an allegory of the struggle against upcoming extremism? While reading it I saw some parallels with occupation: people trying to escape, some suffering from being separated from their loved ones, those abusing the system and enriching themselves with contraband, help being flown in irregularly, etc. But I didn't get as far as Nazism. Do you happen to remember which elements supported that supposed theme?