The Bangladeshi's have always been secular. They aren't a bunch of fanatics- they have always been moderates because they have a great Bengali culture and heritage.
The reason they broke away from Pakistan was because they didn't want to be governed by Islamists.
The 1971 War of Liberation was the first defeat for global Islamism. The Bengali's fought the Islamists and Pakistan's Army and won.
The recent increase in Middle Eastern investment and the drive for Islamification was been startling. People are complaining that there are Arab influences everywhere and its getting worse. The country speaks Bengali and English as there main languages; the increase in Arabic advertising is puzzling to everyone.
The Islamists are looking for quick victory because they've had there butts kicked eleswhere, they see it as a easy target because nobody has been paying attentiion to it.
Bangladesh is certainly Muslim- but they aint no fanatics
The Saudi Arabian importation of cheap Bengali labourers has caused the problem, they have Wahhabised them and sent them back.