The Razakars were armed and highly organised muslim milita supporting the nizam in Hyderabad. They went on a killing spree against the natives who though in numerical majority were unorganized villages. The report even if it is true and is not politically motivated still pales in comparison to the systemic and continues cleansing of 10s of millions that continue to this day in Pakistan.
As for the European generosity they take a tiny fraction compared to India. They insist on integration, which would be politically incorrect in India. Some countries like France and Denmark have already banned the hijab.
Religion is a tiny fraction of a person's identity, but if it comes to eclipse everything then your loyalty to your society that is pluralistic is suspect.
They knew all along that they were illegal migrants. Considering that some of them have only been forced into islam in not more than three generations ago, it is possible that they might convert back to their native roots and claim asylum.