One thing that has proved itself is that cajoling alone does not work. Since Hamas is the de facto government in Gaza, they must take charge and actually enforce what they say is their position. They have to do this with the same ruthlessness they used in the counter coup against Fatah.
One child, police officer killed in attacks in Diyarbakir in southeast Turkey (Reuters)
from the article: Report: Hamas wants cease-fire with Israel in the Gaza Strip