Terrorism is the language that Hamas, Fatah, Turkey and radical Islam understand. This might just work against the enemies! Like making a quota - that for every one Israeli killed by these Arabs, that one Israeli life should be equal to 100 enemies down, or maybe even increase the proportion. Then I think they will finally understand the message.
Judge orders Jerusalem Gay Pride attacker to undergo psychiatric evaluation (Haaretz)
from the article: Shin Bet: Israel's extreme rightists organizing into terror groups