everyone has their hand dirty here , so called secular parties minority appeasement led to radicalization of hindus so blaming modi or BJP for it doesn't make sense . RSS was always there in india the support for it has increased only in the last few years after hindus saw a clear bias against them .
People generally in india take their religion way too seriously , i saw a masjid being constructed in a famous tourist spot in kerala , who constructs a masjid on a beach ? so many illegal religious structures have come up that way in the last decade . Shouldn't we have strict rules against it after all this space could be used for something better , you guys think modi is a hindutva poster boy while he demolished illegally constructed temples in his state , now if he tries to do the same with churches and masjids seculars will just have an heart attack .
There is no such thing as secularism with people. The Indian constitution can be and those who interpret it are bound by it to give decisions based on it. But the Indian people can never be secular, because religion does form a part of their lives and their thinking. What is important that the delicate harmony that was formed due to the constitution is not broken by radicals forming from within the Indian people.
A basic example is when you see rioters going wild after a football game in a seemingly well educated, lawful country. That is because given the right catalyst Human beings can turn destructive within moments(or months or years in case of entire populations a.k.a Nazi Germany). The same goes for India, Hindus who by their otherwise Dharmic nature might be peaceful.. but it only takes ten nutjobs to turn a hundred out of a thousand into blood thirsty genocidal maniacs... the rest of the 900 are left as a silent majority then.