With the US blockade on Iranian shipping and ports in force along the whole of the southern Iranian coastline, and the railway link to China through the border crossing point with Turkmenistan at Inche-Buren damaged, the route across the Caspian has become the only cargo route for heavy traffic which remains under Iranian sovereign control.
Poor innocent victims of imperialisim shipping missiles and trainers to Crimea used to bombard Ukrainian civilians.
Its not anti imperialisim its an arms shipment