It's not propaganda if it's a reality. Assad doesn't like Iranian influence that much. The Russians don't like the Iranian influence that much. And the US-Israel sure don't like Iranian influence anywhere in the world. Assad would rather like to have the Russians and western influence in Syria. Also he was on the brink of signing peace with Israel just before the conflict broke out. And seeing how Israel is constantly destroying and undermining the Syrian state because of Iranian and Hezbollah's presence, he might have to cut a deal with Israel.
Assad doesn't have any options left but to mend ties with US and Israel. The sanctions are crippling, Israel destroys whatever the Syrians try to build up in military terms. Recently the Israeli's took out a Syrian early-warning network which was in the process of being built.
Iran cannot afford to lose Assad. Losing Assad means losing everything Iran has invested in Syria over the last 9 years.
Iranian forces are in the north and the east. The handful of IRGC generals and their guards won't be of any trouble. They might try and hit Assad through other means, but Iran has no way of stopping such a Syria-Israel deal. And good luck trying to get to Assad who's been hiding for 9 years.
The US and Israel would be happy to engage any Iranian proxy in Syria that try to put up a resistance against such a deal.
Btw, Iranian officials have always claimed that they are there by invitation of the Syrian government. And that they will leave by order of the Syrian government. We will see if they leave by order of the Syrian government.
