Kaboom!! Twaf! Twaf! More than 230 dead. All in the name of religion.

A cancer that makes us safer.

Why would a Muslim terrorist kill other muslims?
Would you say it's the bible which influences Christians to rape since it condones it?

Yes, 9 out of the top 10 countries with reported rape cases are majority christian inhabited countries while 6 of the bottom 10 countries are Islam.

Also, from 1994 to 2005, The catholic church spent US $ 1.3 Birrion in setllement of sex abuses.

My unanswered question is why would a muslim terrorist kill muslims who are praying in a mosque?

The Islamic State group's Egypt branch has killed hundreds of policemen and soldiers, and also civilians accused of working with the authorities, in attacks in the north of the Sinai Peninsula.
They have also targeted followers of the mystical Sufi branch of Sunni Islam as well as Christians.
The victims of Friday's attack included civilians and conscripts praying at the mosque.
A tribal leader and head of a Bedouin militia that fights IS told AFP that the mosque is known as a place of gathering for Sufis.

The Islamic State group shares the puritan Salafi view of Sufis as heretics for seeking the intercession of saints.

The jihadists had previously kidnapped and beheaded an elderly Sufi leader, accusing him of practising magic which Islam forbids, and abducted Sufi practitioners later released after "repenting."

An IS propaganda outlet had published an interview earlier with the commander of its "morality police" in Sinai who said their "first priority was to combat the manifestations of polytheism including Sufism."