Mufi bhai, I am not sure how "tolerant" these Bengali Muslims are. As I mentioned before, the very moderate Muslim Bengali also harbors some fudged-up views about enemies of Islam and how they should be dealt with. Maybe in our big cities you don't see the ramifications of such views, but go to vast majority of graams and visit the madrassas. See what kids are being taught. I would say we are not much different from the religious mentality in Pakistan - except our mindset is much less tribal-oriented than their's. This may explain the restraint in violence you speak of.
"Eternal suffering awaits anyone who questions God's infinite love." - Bill Hicks