The All India Christian Council has said attacks against Christians in India has already increased since the opposition BJP seized power in a land-slide victory last month.
It's believed the attacks were carried out by extreme nationalists, pursuing the Hindutva ideology that to be Indian is to be Hindu.
BJP leader, Narendra Modi, stands accused of failing to prevent the 2002 religious riots in his home state Gujarat, which killed more than 1,000 people, mainly Muslims.
Kumar Swamy, National Co-ordinator of the All India Christian Council, told Premier's News Hour the new government won't offer the same protection as the last one.
India's Christian minority has also come under repeated attack from Hindu extremists.
Many of these have been from the far-right RSS (Rashtriya Swayamsevak Sangh), which gave its strong support to Narendra Modi. The aim of the RSS is to turn India into a Hindu nation.
Christians make up less than 6 per cent of India's 1.2 billion population. Hindu nationalists have been open and violent in opposing the church. Militants have murdered several pastors and beaten others. They have attacked and threatened churches and their congregations.
The country's seen a growing number of attacks against religious minorities by Hindu extremists.
Observers say most incidents of mass violence against Christians have taken place in states under the rule of the BJP.
The Evangelical Fellowship of India says Modi's rise has led to growing insecurity among Christians, who fear 'the scale of persecution will increase'.
A point echoed by Paul Thomas, UK Development Officer with Release International, he said: "We've been working with the AICC for the last five or six years and so we are aware of the growing issue in India, which is coming from the Hindu nationalist source.
"It's a concern to see the BJP getting such a landslide victory in the country, in terms of where that could lead now in terms of legislation.
"Kumar spoke about some of the states having the anti-conversion laws in place. Clearly there would be a concern if that were to spread if other states were to take those legislative moves.
"Clearly there have been promises made in terms of the protection for the minority communities, the Christians, but also the Muslim community, which is also a minority community in India.
"Time will tell in terms of whether those statements turn into positive action to protect the community."
In 2008, Hindu extremists launched a campaign of anti-Christian violence in Odisha (formerly Orissa) state, which left more than 120 Christians dead and more than 50,000 displaced.