What happened to the anti-bitcoin politician (forgot his name), seems he is very wvocal about his stance against bitcoin and went as far as saying is bitcoin is used for Ponzi scheme?
He didn't just say it was used for Ponzi schemes, he said it was a Ponzi scheme. It is used for Ponzi schemes all the time, so it's a big difference.
India is the biggest democracy on Earth. One politician who wasn't that significant and goes on about it all the time isn't going to convince their Parliament (his name was Kirit Somaiya, I think he's just a Member of Parliament). The closest India got to banning Bitcoin was the statement by the Finance Minister which was:
The absence of counter parties in usage of virtual currencies including Bitcoins, for illicit and illegal activities in anonymous/pseudonymous systems could subject the users to unintentional breaches of anti-money laundering and combating the financing of terrorism laws.
So really, significant politicians aren't quite against it, just cautious. I understand their concern to some extent - after all, they are trying to run a coherent society with taxes and laws. It doesn't mean that they have to try and regulate every Bitcoin transaction - it just means that they can regulate exchanges and prevent Bitcoin from getting in the wrong hands, although that does contradict Bitcoin's commitment to online freedom to some extent.