Introduction

In its introduction to the hundred questions , the shia website answering-ansar says:

These one hundred questions are from the pen of Allamah Abdul Kareem Mushtaq, a name that needs no introduction for Urdu readers. A former Sunni scholar that converted to Shi'a Islam in the late 1960's, he dedicated his entire life to defending the path of truth. Author of over thirty books, the vast bulk of his works were rebuttals to Nasibi texts attacking the Shi'a, and he managed to silence many leading lights of Mu'awiya's cause, such as Dost Muhammad Qurayshi and Qadhi Mazhar Husayn. A continual thorn in the flabby sides of the Nasibi, the inability of the Marwani Mullah's to refute his books, led to them seeking to ban his books through Court on the grounds that they constituted 'disrespect of the Sahaba'. Despite such efforts, he continued his mission undeterred by Nasibi hate mail and death threats. Some of his most notable books include Furu-e-Deen, wherein he presented one thousand questions for the Ahl'ul Sunnah Ulema to refute and Chodha Masalai (replies to 14 questions typically raised against the Shi'a). A great orator as well as a prolific writer thousands of people in Pakistan converted to the path of truth, through him.

These hundred questions are present in Abdul Kareem Mushtaq's book "Usul e Deen'. He had not studied religion in any religious school and he had no degree in that field. He was probably a Barelwi Sunni before converting to Shia religion. Answering-Ansar was a famous Shia polemic website but later on, it was shut down and another website ShiaPen.com republished all its contents. 

Mawlana Dost Muhammad was born on 15th Muharram 1339 H/29th September 1920 in Tehsil Jampur, India. His father name was Mawlana Ali Muhammad. Some of his books were Ahlus Sunnah Pocket book, Jila ul Azhan, Jila ul Afham, Radd ul Matain, Al Qawl al Jali fi Salat Ali, Baraheen Ahle Sunnah, Azmat e Sahaba, Misbah ul Muqarrareen, Minhaj ut Tabligh, Makhzan ut Taqareer,  Taaruf Khulufa Rashideen, Kashaf ul Haqeeqah an el-Masail Marifat wa al-Tareeqat, At-Tashreeh ala at-Talweeh, Wazahat un Nahw Sharh Hidayat un Nahw, Jami al-Mujarrabat al-Hashimiya, Minhaj ul-Utbaa. He was a great orator as well as a debator. He had many debates with Shias. He debated with Shia debator Muhammad Ismail Gojrwi on 18th September 1955 in District Jhang, Pakistan. He died on 26th May, 1974.

Qadhi Mazhar Hussain was born on 10 Zil Hajj 1336 H/Ist October 1914 in Chakwal, a district of Pakistan. His Father name was Mawlana Karam ud Deen. Some of his books are Difa Hazrat Muawiyah, Azeem Fitnah Shia Sunni Muttafiqa Tarjuma Quran, Basharat ud Darain bis sabr ala Shahadat al Hussain and Mufti Muhammad Yusuf Sahib ke ilmi Jaiza ka Ilmi Muhasiba. He died on 26th January, 2004. 

Mushtaq Ahmad was no match for these personalities.