How would Iran benefit from this supposed plot? Can you think of any country that would benefit from an alleged Iranian plot to assassinate Trump? The stories are not even credible anymore. The less believable the propaganda, the more the desperation of an Empire rapidly losing its status is demonstrated. The Israelis are aware that they are unable to take on Iran and are desperate to draw in the US. Zionists in the US also desire this. The US going to war with Iran would only lead to a more rapid demise of the US. They would no longer be a world power.
They cannot defeat Iran conventionally, not in Iran anyway. Every US base in the middle East would be destroyed by Iran in the event of war with the US. No aircraft carrier group could get within striking distance without being sunk. This is understood by the Pentagon. Resorting to nukes would also have the same outcome. US delivery systems are invested heavily in projecting air power. Modern air defence and missile technology has neutralised that threat and the US and West in general have been left behind. Iran have "missile cities" buried deep in the deserts and mountains which would be launched in the event of a large attack on it. There would be no Israel and the US would finished as a world power.