New Delhi/IBNS, June 20 -- In Indian politics, the most effective attack on the Congress often comes from within. This week, Shashi Tharoor handed the BJP its sharpest ammunition - not through a slip, but through a considered, calibrated endorsement of Prime Minister Narendra Modi's diplomacy at the G7 Summit in Evian, France.

The Congress had spent days hammering Modi for alleged silence over the deaths of three Indian seafarers killed in a US strike on a merchant vessel in the Gulf of Oman.

The opposition demanded accountability, an apology from Washington, and a public reckoning from the Prime Minister. Then Tharoor, Congress MP and Chairman of the Parliamentary Standing Committee on External Affairs, walked up to a microphone and sa...