You know what's more horrible than war? Not being able to wage war. I'm from a country (Bangladesh) that fought a war, in which about half a million people died, to free itself from Pakistan, which was treating us like second-class citizens. In doing so, we were able to separate ourselves and plot our own course. And lucky for us--as theocracy has overtaken Pakistan, Bangladesh went from being significantly poorer than Pakistan (40% lower GDP per capita) to catching up and on a path to overtake. Not to mention, being a (relatively) freer society. War is a fundamental tool in the exercise of self determination.
Most people who talk about how "horrible war is" have never been in a context where killing or being killed is preferable to the status quo.
And yet war is still terrible, and people should know it, even if it's sometimes less terrible than the alternative. The choice should be made with eyes wide open, not lulled into its fangs unbeknownst.
I always wonder why did they go ahead with the idea of being a part of Pakistan in the first place, especially when their ties to the language was stronger and older than ties to a religion/politics. Was autonomy out of question ?
At the time, East Bengal was almost completely agrarian, and highly dependent on the industrial centers in West Bengal (which went to India), and Pakistan.
War memorials and museums should include as many depictions as possible of the horrors of war, including sounds and smells, to better vaccinate new generations against it.