Why were the Arabs unable to defeat Israel in the war of 1948-9, 1956 and 1967?

Although the odds were against Israel, they managed to defeat the Arabs and benefit from the wards because of their strengths and Arab weaknesses. Israel was successful because they were organized and disciplined and they had help from foreign powers. Arabs didn't want to recognize the state of Israel. During the war of 1948-9, the Arab states were weak and divided. Their defeat was because of their poor leaders and they had no planned attack. …

…electronic equipment and their arms were far better then the Arab states, they were highly skilled and well trained. Israel became richer and more developed since the war of 1956 and they had foreign aid from the US. The US knew Russia was arming Egypt and Syria and gave Israel $1000 million a year, which Israelis used wisely to improve their economy and spend most on arms. The Arab armies were virtually useless without their air force.