Complex sentence: Abraham Ben-Tzur labelled the Ba'ath Party which took power in the 8th of March Revolution in Syria and had taken power in Iraq as the "Neo-Ba'ath" for the reason that the Ba'ath Party had dumped their pan-Arab credentials.
Split into simpler sentences: Abraham Ben-Tzur labelled the Ba'ath Party which took power in the 8th of March Revolution in Syria and had taken power in Iraq as the "Neo-Ba'ath". The reason being that the Ba'ath Party had dumped their pan-Arab credentials.