He and Iran did everything possible to ensure that oil and, primarily, gas from Qatar, the UAE, and Saudi Arabia could not flow to the EU via the cheapest route—through pipelines.
Now, after the fall of Assad's regime, in the event of stabilization in Syria, pipelines could be laid through Syria and Turkey to the EU, which would forever deprive Putin of the ability to blackmail Europe and diversify energy supplies.
https://x.com/Gerashchenko_en/status/1865809728829620328
This would threaten ruzzia's primary source of revenue.
I predict President Trump will use this as one of his "hammers" to bring ruzzia to the negotiating table.