Their number one mistake would have been trusting America to begin with.
There should need to be no Israeli propaganda to convince them not to trust America.
The US has the power to stop Israel from carrying out an attack. Iran knows this, they had said before any attacks happened that if an attack is carried out they will cease negotiations and start focusing on the development of nuclear weapons.
From what I've seen since the attack, they are sticking to this plan.
I've been thinking of joining. Seems this makes the decision easy.