Answer:
Israeli Jews and Palestinian Arabs
Explanation:
The two main groups of people that clash over the internal boundaries of Israel are "Israeli Jews and Palestinian Arabs"
The clash/conflict between the two groups has been a matter of world concern for years. This conflict is traced from the time of Jews immigration. It is seen in the sectarian conflict in Mandatory Palestine between Israeli Jews and Palestinian Arabs. Their conflict has been referred to as the world's "most intractable conflict"
