Religious scholars in Pakistan have declared attacks on minorities as un-Islamic.
The scholars added that Islam does not permit senseless attacks on worship places of non-Muslims.
The declaration was issued just two days after two suicide bombings in the northwestern city of Peshawar killed over 80 and injured nearly 130 people in a packed Church when Christians were performing Sunday's service.
The parliament late Monday passed a unanimous resolution, strongly condemning the attacks as heinous and inhuman.
The resolution said the attacks were not only against Christian but against all Pakistanis.
The parliament expressed solidarity with the Christian community and sympathized with the bereaved families and prayed for early recovery of the injured.
The terror attacks, which also killed 34 women and some children, are being widely condemned in Pakistan and across the world.
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Islamic parties and religious scholars also slammed the terrorists to target innocent and peaceful Christians and said these brutal attacks have posed serious threat to the possible peace talks with the armed Taliban.
A banned group "Jundullah" had claimed responsibility for the attacks and its spokesman, Ahmed Marwat, said the attacks were revenge of the U.S. drone strikes in the tribal regions.
He warned that attacks on non-Muslims will continue unless the U.S. stops drone attacks.