Radicalism and zealotry often blind their victims. Consequently you seemingly missed the fact that the entire international community agrees with the French FM. The Dubai assassination, if Israel carried it out, was not an act of self defense. It was done to preserve and perpetuate Israels illegal 42-year occupation of Palestinian territory Such acts are conducted to kill active resistance to the continued oppression of occupied people. The solution: end the occupation; form a sovereign Palestinian state. Radicalism and zealotry also possibly obscured your observation of the current policy position of Hamas on the issue of peace. Khaled Meshal stated in 2009 that Hamas would accept a Palestinian state, based on 1967 borders, and is willing to negotiate permanent peace with Israel.
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: French FM: Dubai killing proves need for a Palestinian state