Raheel Sharoon, development officer for the Church of Pakistan told Premier's 'News Hour' it was because of "God's grace" that Sunday's atrocity, which led to the killing of 15 worshippers didn't result in the deaths of hundreds more.
Mr Sharoon said: "People are very angry with the government because they feel there was not proper security available to those churches, which is somewhat correct, because both of the churches which were attacked are the biggest congregations in the area."
"On any given Sunday there are between, say, 800 to 1500 people in each of the congregations. So I would say this is God's grace that the suicide bomber was unable to enter the church. That would've been a huge catastrophe.
"You can have as many people standing at the door as you want, but if a suicide bomber attacks you, someone will die... I think the solution to the problem is far more complex, far more long-term than this.
"People need to be very vigilant now; they need to build good relations especially with non-Christians in the area, because whenever such attacks happen, usually someone from the local area is involved.
A Taliban splinter group has admitted being behind the two suicide bombings on a Protestant and Catholic church in the city of Lahore during Sunday prayers, the worst on Pakistan's Christians since 2013.
"To be honest we are at war with these people, people who are doing these bomb blasts... They're hitting everybody, they're hitting mosques, they're hitting churches, they're hitting schools," Mr Sharoon added.
The attacks have reportedly sparked protests, with Pakistan's Christian minority blocking roads and burning tyres in the eastern cities of Lahore, Faisalabad, Sargodha and Gujranwala.
The authorities have appealed for calm after reports an angry mob lynched two people suspected of involvement in the attack.
Christian missionary schools around the country remained closed on Monday as Pakistan observed a day of mourning.
The Pakistani government's vowed to bring the Taliban to justice after these and previous attacks, and has reportedly increased security at churches across Pakistan.
Listen to Raheel Sharoon speaking to Premier's Des Busteed on the News Hour:
