It was pretty ridiculous to even mention Jamatis and Razaakars in the first place. They have nothing to do with the problems in Myanmar. And never will be.
No idea really
Let ASEAN, the West and may be China take care of it. Bangladesh currently has enough problems of its own, and will continue to do so in the future.
And even if Bangladesh does something on the entire issue of Myanmar, it won't be effective. It is simply too weak to have any effect. And what's more, most Burmese are hostile toward Bangladesh for unknown reasons. Bangladesh is not a regional power, never will be and nor does it have any intentions to be so.
In fact, I won't give a damn if those Burman cavemen suppress and kill all Muslims in their country. If they fail to take any preventative measures other than just having visions of "economic miracles", the ball's in ASEAN's court.
The last thing this "Ummah" could use is to a have a new dog having his days.