Only two groups of Arabs serve in the IDF - Bedouins and Druze. The average Muslim is not allowed to serve inthe army because their loyalties are often questionable. They even onvolve themselves in protests asking other Arabs to stop serving. While most Arabs are decent citizens in Israel, most DO NOT support Israel as a Jewish State, and only ARABS have been caught helping or spying for Hizbollah, Hamas, or IJ - and transporting bombers into Israel using their ID cards as pass. The same questionable group of Arabs appear time and again in violent protests which always result in property damage and injury.
from the article: Poll: 68% of Jews would refuse to live in same building as an Arab