This op-ed from The Telegraph (UK) says that Sonia Gandhi had no right to walk away from the PM's job since the people voted for Congress because they thought they were voting for her.

He uses some pretty strong words - 'betrayed democracy', 'Trojan Horse' - to make his case. He also makes a pretty offensive statement about how people may not have voted for Congress if they knew that Dr. Singh would be the PM because Sikhs were responsible for Indira Gandhi's assassination.