Maybe because they believe he didn't say it and the Aussies are unfairly targeting them? You really need to try to see the perspectives from both sides SST. I disagree with sacking of the tour, and acting the way they do as well, but you need to try get yourself out of a warped field of view.
In any case, I agree the Indians are forward in this in the most immature manner possible. If you think the hearing was unfair, spell out your reasons why, and present them to the ICC meeting. And then you can make changes going forward. There is no reason for this type of reaction - what exactly are they trying to accomplish? How do they see the end game here? OK, they can cancel the tour - but then what? It means nothing, and the best way to move forward is to fix any problems they may have with the current system.
I was rallying against the umpiring decision as much as anyone, but this is going way over the top. It's not the end of the world. Yes, they cost you a match but you should do what you want at the ICC and push for changes in the way Tests are umpired instead of throwing a hissy fit as they are now. This is getting to be ridiculous. If BCCI do not push with everything they have and get immediate and significant changes in umpiring (in terms of referrels, technology, increase in elite umpires, whatever), then they have no right to complain and should just shut up.