“Ukraine accidentally shot down a passenger plane in 2001.
The US Navy accidentally shot down a passenger plane in 1988.
Why should whoever accidentally shot down this plane face tougher consequences than the Ukraine and USA did?”
You conveniently forgot to mention that the Soviets shot down KAL 007. Oh, wait a minute. That was no “accident”.
Also that the Iranian plane would not acknowledge the warnings that it needed to identify itself.