Since the demise of the Soviet Union and especially since the death of Arafat, Fatah has become solely and purely a palestinian nationalist organization with no other cause than that of establishing the largest and strongest palestinian state as soon as it can possibly be done. Hamas, on the other hand, has other "irons in the fire" since it is not simply a palestinian nationalist org, but is dedicated to cause of extending the power of radical islam throughout the world by any means possible. This may make Hamas more dangerous to the US, to Europe, and even to less radical moslem nations, but it has the effect of making Hamas less dangerous to Israel, since for Hamas the palestinian cause is simply a means to a greater end and not a priority in itself. The fact that Hamas is commited to a "rejectionist" line regarding Israel actually makes it less dangerous in the long run to Israel's security.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: An invitation to shoot