If you isolate too many of your enemies, they will unite against you. The coalition of Iran-Syria-Hamas-Hezb is one circumstance and convenience not of ideology and belief systems. Israel, with the full support of the US, chose to isolate its enemies completely, discard them, and regard them as completely invisible (as Israel did with Hamas). This is the very reason why these, otherwise individual, "terrorist" elements are coming together to break this imposed isolation on them. In other words, they are all they have left. Surely any rational thinking person would see that this policy is not only wrong, but also very dangerous.
Surfer seriously injured in Australian shark attack (AP)
from the article: Senior Arab officials tell Israel that Syria is not planning to attack