Complex sentence: Mosco accused the French Communist Party (PCF) of having deliberately sacrificed the fighters in the power struggle with the Gaullists for control over the National Council of Resistance (CNR), mainly because their foreign origins undermined depictions of the Resistance as a native patriotic movement.
Split into simpler sentences: Mosco accused the French Communist Party (PCF) of having deliberately sacrificed the fighters in the power struggle with the Gaullists for control over the National Council of Resistance (CNR). He suggested this was done because their foreign origins undermined depictions of the Resistance as a native patriotic movement.