the NCTB did the job in such a hurry that the authors and the editors got little time to go through the texts." The Primary and Mass Education Minister Mostafizur Rahman has promised the errors will be corrected. There have also been attacks on Sufi preachers and personalities by puritanical/revivalist groups. Small minorities There are also few Shi'a Muslims, particularly belonging to the Bihari community. The Shi'a observance commemorating the martyrdom of Ali's sons, Hasan and Husayn, are still widely observed by the nation's Sunnis, even though there are small numbers of Shi'as. Among the Shias, the Dawoodi Bohra community is concentrated in Chittagong. There are no adherents of the Kharijite sect in Bangladesh except foreigners such as Omani diplomats and workers at Omani missions residing in Bangladesh. Muslims who reject the authority of hadith, known as Quranists, are present in Bangladesh, though having not expressed publicly but are active virtually due to fear of gruesome persecution considering the present political situation. The Ahmadiyya community, which is widely considered to be non-Muslim by mainstream Muslim leaders, is estimated to be around 100,000, the community has faced discrimination because of their beliefs and have been persecuted in some areas. There is a very small community of Bangladeshis whom are adherents to the Mahdavia creed. There are some people who do not identify themselves with any sect and just call themselves Muslims. They are known as non-denominational Muslims and are few in numbers although many Sunnis in Bangladesh also call themselves Muslims only and do not emphasize themselves being Sunni. Demography The population of Bangladesh have gone up from 28.92 million in 1901 to 150.36 million in 2022, as per as statistics the same way the high fertility rate among Muslims have led to over population of the country as according to census, Muslim population have gone up from 19.12 million in 1901 to 150.36 million in 2022. The Muslim percentage have also got increased from 66.1% in 1901 to 91.04% in 2022. The Muslim population in Bangladesh is 150,360,404 covering up 91.04% of Bangladesh population as per 2022 census. Estimation shows that over 1 million Rohingya Muslim refugees live in Bangladesh who have came here during the period of (2016–17) crisis. On 28 September 2018, at the 73rd United Nations General Assembly, Bangladeshi Prime Minister Sheikh Hasina said there are 1.1-1.3 million Rohingya refugees now in Bangladesh. According to Pew research