India is just pretending to be irked with the development, infact I wouldn't be surprised if Bangladesh is trying to get close to China at the behest of India.
BNP and Jamaat have sold out to the Americans and are bending over backwards to give the Americans a Naval base in the Bay of Bengal, a naval base clearly directed at the Chinese in the short term, and admittedly not in India's interest either in the long run.
The Chinese have obviously got a whiff of this, and they are now firmly backing the BAL government. China along with India will make sure BAL government stays in power in Bangladesh in the next few years to come. Bye bye BNP and Jamaat