If you love India/भारत 🇮🇳 & you want it to be a united force then please speak up against Hindi imposition on non-Hindi States. 

Pakistan which came into existence as an Islamic state forced Urdu as National Language on its Citizens which led to division of Pakistan in 1971 as non-Urdu speakers revolted against Urdu imposition under the garb of National Language. 

India came into existence in 1947 but Indian continent or भरतखंड is in existence from thousands of years and that existence is based on different languages & cultures, so anyone expecting India to follow 'one nation one language' is an ignorant & insensitive person who doesn't understand our cultural core.

Hindi/Hindoostani is the newest Indian language which Britisher invented for their convenience to rule British India by converting Urdu (which was Official language of Mughal empire in Indian continent) into Devnagari script and then adding words from other native Indian languages primarily from Sanskrut & Marathi. Hindi/Hindoostani in past 100+ years actually is responsible for demise of many native Indian languages from North India such as Awadhi, Brij, Bhojpuri, Maithilee & many more, so non-Hindi people from non-Hindi States fearing for existence of their State Language (in front of increase usage of Hindi/Urdu) is fully justified and cannot be termed as unwarranted or extreme.

Language can never be a secondary priority for many Indians especially from Dakhhani region (Maharashtra & below towards South) because native languages here are more than 2,000+ years old which has shaped culture, history & identity of these societies and hence cannot be given up at any cost.

India doesn't need common language what India really need is a common script (like Latin is in European Union) so that it will help people to learn/adapt to new languages when they migrate to different states of India.

The solution to language issue is that every Indian needs to be Multilingual (especially those who migrate) and also need to accept the fact that State Language of respective State have apex stature in those States which cannot be undermined by Hindi or English or any other languages.