If your assertion were true, there would not be many Arabs left. The truth is that Israel has always wanted to live in peace with its neighbours and still does. To protect itself from the many attacks on it, Israel has created a formidable army. If you are referring to an incident in which Mahmud al-Mabhouh was killed in Dubai, he was no politician as, say, a British MP is a politician, but a terrorist leader, murderer of civilians, kidnapper and arms procurer. No proof has ever been offered that six or any other number of Mossad assassins had anything to do with his demise, although speculation was rife at the time. Whoever engineered his end has done the whole free world a great favour. Presumably, you are not a great believer in the free world.
Netanyahu condemns West Bank arson attack, calling it 'terror' (Haaretz)