In his own words,
So he started off with a wish list to study in Madina University (a Wahhabi university of amateurish standards) which should show his already Salafi influence and problematic upbringing. But he ended up learning secular studies and influenced by youth groups there. He affiliated with “Sheikhs” & students, however it did not satisfy his youthful passion and desires. So he self studied books of Ibn Taymiyya, Ibn al-Qayyim and Ibn Abdul Wahhab and discovered what Islam really is. He wrote down a book on this rediscovered Islam and spent the rest of his life giving dawa on it.
For those who don’t know him, this individual is a major reviver of political takfirism among Salafis. Although political takfirism originated from groups like Muslim Brotherhood and Jamat e Islami (both off shoots of Salafism & Wahhabism), their major branches long mutated and watered down some of that extremism but it was retained among offshoots of these groups. And this individual played a major role in reviving it into mainstream and responsible for formulating the modern day takfiri discourse, manhaj and arguments that we see today espoused by political takfiri groups. He is also known to be major influence on the school dropout and petty criminal Abu Musab al-Zarqawi who orchestrated the Sunni-Shiite civil war in Iraq. And one of his students whom he gave ijazah (not a joke) and made a mufti of his website, Turki al-Binali, went out to become a major mufti of the splintered Khawarij sect Daesh/ISIS.
We see the prophecy of Prophet Muhammed (peace be upon him) being fulfilled before our eyes:
Abdullah ibn Amr reported: I heard the Messenger of Allah, peace and blessings be upon him, say, “Verily, Allah does not take away knowledge by snatching it from the people but rather He takes away knowledge with the death of the scholars until He leaves no scholar behind and the people turn to the ignorant as their leaders. They are asked to give religious judgments without knowledge, thus they are led astray and lead others astray.” [Sahih Bukhari, Sahih Muslim]
Narrated Hudhaifa bin Al-Yaman: The people used to ask Allah’s Apostle about the good but I used to ask him about the evil lest I should be overtaken by them. So I said, “O Allah’s Apostle! We were living in ignorance and in an (extremely) worst atmosphere, then Allah brought to us this good (i.e., Islam); will there be any evil after this good?” He said, “Yes.” I said, ‘Will there be any good after that evil?” He replied, “Yes, but it will be tainted (not pure.)” I asked, “What will be its taint?” He replied, “(There will be) some people who will guide others not according to my tradition? You will approve of some of their deeds and disapprove of some others.” I asked, “Will there be any evil after that good?” He replied, “Yes, (there will be) some people calling at the gates of the (Hell) Fire, and whoever will respond to their call, will be thrown by them into the (Hell) Fire.” I said, “O Allah s Apostle! Will you describe them to us?” He said, “They will be from our own people and will speak our language.” I said, “What do you order me to do if such a state should take place in my life?” He said, “Stick to the group of Muslims and their Imam.” I said, “If there is neither a group of Muslims nor an Imam ?” He said, “Then turn away from all those sects even if you were to bite (eat) the roots of a tree till death overtakes you while you are in that state.” [Sahih Bukhari]
Note that the advice of the Prophet (peace be upon him) in the above hadith was to stay with the Jamah of Muslims and if not found, then stay away from all groups. Advise was not to join the sect that is more closer to the truth, or a group that apparently seems to be doing some good deeds, or even to gather a group of friends and start a new sect altogether.