Nah no one is concerned. We are just having a hearty laugh at Kanglu delusions.
Pakistan after trying for 70 years and fighting 4 battles couldnt take Kashmir and you think Bangladeshis will take Indian states? LOL. These are just banters
Also, if I see that map right, their Wishlist includes Bihar as a part of greater Bangladesh as well. Imagine thousands of Biharis infiltrating Bangladesh. Next day Bengalis will be like - uri baba....we want freedom like in 1971.