Dhaka, Nov 09 (ANI): Political uncertainty and unrest plunged Bangladesh into a cycle of violence as the two main political parties exploit the tension between secularists and Islamists ahead of elections. Recently, Bangladesh's main opposition party refused a request from the prime minister to form an all-party government to oversee upcoming elections, setting the stage for a showdown this week that could delay or even derail the polls altogether. Senior advocate, Bangladesh Supreme Court, Yusuf Hossain Humayun, while talking to a reporter blamed the founder of Bangladesh Nationalist Party, Ziaur Rahman for allowing Jamaat-e-Islami to function as a political party. Commenting over the demand for a caretaker government, Humayun said that a constructional amendment for such a demand was not possible.