New Delhi, April 8 -- By barraging social posts to urge Iran to make a deal and threatening to end the "whole civilisation", is US President Donald Trump deploying what's known as the "Madman Theory"? An international law expert said he believed that there was a deeper strategy at play.

Over the weekend, Trump posted an expletive-laden message for Iran, saying, "Tuesday will be Power Plant Day, and Bridge Day, all wrapped up in one, in Iran. There will be nothing like it!!! Open the F***** Strait, you crazy b******s, or you'll be living in Hell - JUST WATCH! Praise be to Allah," was Trump's ominous weekend warning."

He vowed to strike Iran's power plants and bridges if the country's leaders don't reopen the Strait of Hormuz. "Tuesday, 8...