Navo explained it best. I agree with every single thing he addressed.
On the issue of Rohingyans being Bengalis,well they do speak a similar dialect to Chittagonian and more importantly thier language has indo-aryan roots, as opposed to the the rest of Burma's sino-Tibetan. But the matter of fact is such inter language differences in a nation is all too common. Just consider India. It doesn't mean we should annex people similar to us, without annexing their territories too.But the Burmese authorities won't like that will they? They want to drive the Rohingya's out, but keep all their land.