“Regime supporters also point fingers at Israel, Azerbaijan, accusing the countries of conspiring against Iran.”
Duh?
While that is certainly possible, Israel has a very long track record of not killing heads of state. They had multiple opportunities with Nasser and even Yasser Arafat, but passed due to policy reasons.
This was a 50 year old helicopter flying in bad weather in treacherous terrain.
Odd are it is what I learned at Ft Bragg (wearing a yellow hat for those that know) a “controlled flight into terrain.”