Complex sentence: The polarities which divided Ireland during the Anglo-Irish War and Irish Civil War increasingly sidelined Gywnn's brand of moderate cultural nationalism, although he supported the newly emergent nation he equally condemned some of the excesses, as burning houses belonging to Free State senators.
Split into simpler sentences: The polarities which divided Ireland during the Anglo-Irish War and Irish Civil War increasingly sidelined Gywnn's brand of moderate cultural nationalism. Although he supported the newly emergent nation he equally condemned some of the excesses, such as the burning of houses belonging to Free State senators.