Answer:
The main motivation behind the United States supplying arms to Israel in the 20th century was that they had a common enemy.
Explanation:
- Iraq and other Arab countries in the middle-east have been explicitly recognized as 'enemy nations' by Israel by officially passing certain laws.
- On the other hand, the United States has also had bitter relations with Iraq for a long time and has always tried to dominate Iraq in order to make it stop supporting terrorism and allied activities.