With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Alan Dershowitz wrote in his book "The Case for Israel" that the policy of the Haganah, unlike the Irgun, had been to encourage the flight of local Arabs.
text_B: According to Alan Dershowitz, if a person did not want local Arabs to stay then they likely would have strongly supported the Haganah over the Irgun?
YES.