@T-Rex @aazidane
Khaleda and Hasina both don't want the Military to come to power, after seeing what happened last time. The people are done with both, neither can bring people to their side as effectively as before. Back then Zia and Mujib relations could help one of the Begums come to power not anymore. Most people are done with this Independence crap. Jamaat and its alies has better and more loyal support, as they can claim that they represent the Muslims of Bangladesh and it is growing stronger.
I agree with
@aazidane that Khaleda could bring the Indian stuff and there are quite a lot but both Begums again fear that if Army comes to power, then India might shelter them or stand up to their side. Thus she is too afraid to bad mouth India. No matter how many pro-Indian officers Hasina employ, the Army will always be anti-Indian and also our Army wants to cozy up to the Chinese and buy some of their equipments to modernize the Army and they know that if we have a pro-Indian government, they can't get those weapons.
Both of them also have legitimate reasons to hate the Army as well, as one's father and the other's husband was killed by an Army Coup.
That's why you will see that there is an arrest warrant against Khaleda and nothing else, both wants power but neither wants the Army to come to power or anyone else in the process.
The Army and Jamaat have more in common than with the other 2 party and thus to stop both of them working together the government creates all this farce "anti-war tribunal" and "hanging of war criminals".