Irsrael can’t afford to wait. I did read where Saudi Arabia wouldn’t attack Israel if Israel flew over its country. Also, Iran is a threat to some other Arab countries.
Sorry for the delay in answering your post. You're partially correct, the Saudis offered their airspace to the Israelis’ if they attacked. I don't remember hearing Israel asking permission. This is a strange story though. I always thought the Saudis were backing Iran and their crazy nonsense. I guess, in the Middle East, keeping your friends close and your enemies closer is just a normal activity.