Metaphorical diplomacy

From 'Yaaro Yaaro':

Kaadhal kondu pesumpothu,
Chennai tamizhum sennthaen thaan.

A tamizh poet never lets down tamizh?!!!

On the other hand,

Aasai vellam paayumpothu,
Vangakkadalum vaaykaal thaan!

Bay of Bengal paavam... no one to defend!