I agree with Vootee...why is it such a big deal. The issue is important and what better oppurtunity to educate mass of indians do some research on where Buddha was born. I am amazed to see "budhha was born in India" concept dug deep at general people level.

Ask your coworker, he truely belieevs Buddha was an Indian. Indians need to be in the habit of saying Buddha was born in former Indian Subcontinent which is part of Nepal now.

This was a great oppurtunity taken by those guys to let the general Indians know how Nepali feel about Buddha.
'
Beside Banners are not new. Research Americans banner that read " Soviets get the puck out of Afganistan" in the olympic hockey game.

There are always some odd banners here and there. Its not a big deal. Most general Indians won't even know what that banner means. Many would probably just think it was a joke as they truely believe Buddha was an Indian.