You probably cannot find this because it is not specifically stated in the story -- you are supposed to infer it from what happens in the story.
To me, what Kipling is trying to show is that the British presence in India is often arrogant and ignorant. He shows this through the actions of Fleete. Fleete is arrogant enough to desecrate the image of the god with no regard for what the Indians might think of his action.
We see the ignorance of the British the fact that none of them seem to understand, at first, what is going on.