It’s a combination of different things. The US admitted that Iran shared info with China and Russia after cracking their websites, but the case with China was much more severe. I think the supposed mole was a patsy, but I don’t think Iran caused it.

The cause of the leak that killed the agents was disputed by investigators, with some believing a mole was responsible, others believed the CIA comms system was hacked.

The CIA and FBI has and always will be racist. They usually suspect non-white agents of being the mole while ignoring white agents lol.