Complex sentence: Ostensibly, HAIG was only there to provide economic relief, but its advocacy work often attempted to "rewrite history" and the organisation drifted into right-wing extremism in its later history.
Split into simpler sentences: Ostensibly, HAIG was only there to provide economic relief, but its advocacy work often attempted to "rewrite history". The organisation drifted into right-wing extremism in its later history.