Tehreek-e-Taliban Pakistan spokesperson Shahidullah Shahid told the BBC Urdu yesterday that his group did not carry out the church attack, but it believed the bombing was according to the Islamic Shariah.
However, leaders of the Sunni Ittehad Council said that Shahid's statement was contrary to the teachings of Islam, a religion that calls for respecting all places of worship.
"The Taliban's claim that the church attack is in line with the principles of Islam is wrong and un-Islamic. Islam forbids damaging the places of worship of all religions," the clerics said in a joint-statement.
"If the government holds peace talks with the Taliban, it should also hold dialogues with all prisoners who have committed heinous crimes," the clerics said.
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The clerics from the Barelvi school of thought has said that Islam provides complete security to religious minorities and affiliating terrorist activities with Islam is tantamount to defaming the religion.
"Shahid's statement is based on the ideology of terrorists, which has no connection with or roots in Islam. Such a stance is against the Holy Quran and Sunnah," they added.
The Ulema urged the government to launch an operation against the terrorists who caused irreparable loss to both Islam and Pakistan.
"They (Taliban) don't deserve any leniency," the statement said.
The TTP, which has waged a bloody war against the Pakistani state since 2007, has issued stringent conditions for its participation in talks, including the release of its cadres from jail, withdrawal of troops from the tribal areas along the Afghan border and an end to US drone strikes in Pakistan.