Abbas is doing the only thing he realistically can do. Israel is not empowering him, so the only way for him to save the moderates is to stand up for Palestinian principles and step out of the race. Then, at least the dignity and sanctity of the moderate movement will be preserved. Otherwise, extremists would be empowered, as I think Israel did not plan to allow pre-1967 borders anyway, even though they agreed to it in the Road Map.
Germany sends suspected ISIS recruiter back to Spain (AP)
from the article: ANALYSIS / Bluffing or not, Abbas has shown he's no Arafat