Israel better be very careful. There are Russians there who are primarily responsible for maintaining the safety of the operational reactor and oversee critical systems. If Russia decides to activate its S-400 systems against Israeli jets that travel over Syria to protect Iranian assets, the Israel-Russia relationship would likely shift from "complicated" to "combative."
Syria is the "geographic bridge" where the interests of Israel and Russia most frequently collide. In the context of the current 2026 war with Iran, its importance has only intensified. For years, Russia has controlled the skies over much of Syria via its Hmeymim Air Base. If Israel were to kill any Russians at Bushehr, there could be serious repercussions.
Source - Gemini