It is hard to imagine that a dingy Internet cafe buzzing with flies in this provincial Palestinian town could have spawned a blogger who has angered the Muslim cyberworld by promoting atheism, composing spoofs of Quranic verses, skewering the lifestyle of the Prophet Muhammad and chatting online using the sarcastic Web name God Almighty. But many people in Qalqilya seem convinced that this Facebook apostate is none other than a secretive young man who spent seven hours a day in the corner booth of a back-street hole-in-the-wall here. Until recently the man, Waleed Hasayin, led a relatively anonymous existence as an unemployed graduate in computer science who helped out a few hours a day at his father's one-chair barber shop. Several acquaintances described him as an 'ordinary guy' who prayed at the mosque Fridays. Since the end of October, though, Hasayin -- who is in his mid-20s -- has been detained at the local Palestinian Authority intelligence headquarters, suspected of being the blasphemous blogger who goes by the name Waleed al-Husseini. The case has drawn attention to thorny issues like freedom of expression in the Palestinian Authority, where insulting religion is considered illegal, and the cultural collision between a conservative society and the Internet. While Hasayin has won some admiration abroad, some on Facebook are calling for his execution. Others on the social networking website formed a group in solidarity to support him, and several online petitions are also backing him. In his hometown, the reaction seems to be one of uniform fury. Many here say that if he does not apologize, he should spend the rest of his life in jail. 'Everyone is a Muslim here, so everyone is against what he did,' said Alaa Jarar, 20, who described himself as not particularly pious. 'People are mad at him and will not respect the Palestinian Authority if he is released. Maybe he is a Mossad agent working for Israel.' Aside from his Facebook pages, which have since been deleted, Husseini, the online persona, also posted essays in Arabic on a blog called Noor al-Aqel (Enlightenment of Reason) and in English translation on Proud Atheist, identifying himself as 'an atheist from Jerusalem -- Palestine.' The essays offer some relatively sophisticated arguments in a blunt and racy style. In one, titled 'Why I left Islam,' Husseini wrote that Muslims 'believe anyone who leaves Islam is an agent or a spy for a Western State, namely the Jewish State.' He added, 'They actually don't get that people are free to think and believe in whatever suits them.' He went on to describe the Islamic God as 'a primitive, Bedouin and anthropomorphic God,' and Muhammad as 'a sex maniac' who bent his own rules 'to appease his voracious desire.' His descriptions seem like a far cry from the ideologies of the town of Qalqilya, a conservative low-rise area of more than 40,000 people where horse-drawn wagons plied the streets this week and the market was bustling ahead of the Muslim holiday marking the end of the annual pilgrimage in Mecca, Saudi Arabia. The arrest of Hasayin has caused a sensation since it was first reported by the independent Palestinian news agency Maan. There are also some who question whether he could have written all this material alone. Hasayin's father, Khaled, was reluctant to talk. Clearly upset and ashamed, he said that his son was in treatment and had been 'bewitched' by a Tunisian woman he had met via Facebook. Before shooing reporters out of his barber shop, where a framed Quranic verse hung on the wall above tubs of hair gel, he said that his son's literary Arabic was not at a level where he could compose fake Quranic verses. One relative of Hasayin said, 'It is true he studied computers, but he is not a philosopher.' At the local intelligence headquarters, officials seemed to be treading carefully surrounding the arrest. Speaking on the condition of anonymity because of the case's potentially explosive nature -- Salman Rushdie's 'Satanic Verses' led to riots and death threats in the 1980s, as did cartoons of Muhammad in the Danish newspaper Jyllands-Posten in 2005 -- the officials said they could not release any details since Hasayin was still under interrogation. They said they had to act fairly and with sensitivity in case the suspicions proved false or exaggerated. They said Hasayin had not been allowed to have visitors. Hasayin, they added, told them that he did not need a lawyer. The officials also said that he was being detained partly for his own protection. Palestinian human rights groups in the West Bank have so far remained silent about Hasayin's arrest. But Majed Arouri, a human rights expert in Ramallah, said he believed that the way in which Hasayin had been detained and his correspondence recorded 'contradicts human rights principles and existing Palestinian laws' regarding individual privacy. If Hasayin is to be tried, Arouri said, it would be according to a 1960 Jordanian law against defaming religion, a mandate still valid in the West Bank. Some bloggers are already comparing Hasayin, or Husseini, to Kareem Amer, an Egyptian blogger who was sentenced in 2007 to four years' imprisonment for insulting Islam and the Egyptian president. At the Internet cafe that Hasayin frequented, youths played online billiards and looked at pictures of girls on a recent afternoon. The owner, Ahmed Abu Asab, said that six weeks ago he discovered that Hasayin was 'not a regular client.' Abu Asab had grown suspicious of Hasayin's activities because he would not let anybody come close and see what he was working on. Abu Asab said: 'At first I thought he was looking at pornographic sites and chatting with girls. That would be normal and none of my business.' Abu Asab said he used software that allowed him to check what the client was up to, and among other things, he came across the Facebook page on which Hasayin appeared to be speaking in the name of God. Abu Asab said that he and three friends knew what was going on and that 'maybe somebody' informed the authorities. Abu Asab kept copies of the pages, and Palestinian Authority officials came and downloaded the material. Next, they came for Hasayin, who asked for a moment to close what was on his screen. 