Earlier quoted context omitted.
Hopefully never. Nazi Germany was a democracy. They cancelled the elections during the war - but then, so did the British. I think it's good to be aware of how sick a democracy can get. Anti-Semitism was very popular in Germany. Islamophobia is very popular in India. You can't just blame it on a few evil strongmen. Sometimes, it's the culture that's at fault.
It was a democracy, but it was not what is known in political philosophy as a liberal democracy. A liberal democracy is one that respects human rights. So India under the rule of the BJP is transforming from a liberal democracy to an illiberal democracy. This is not surprising, since liberal democracy is a modern western concept, but the BJP holds that traditional Hindu culture is best.
I also think human rights are distinct from liberal democracy - since liberal democracies predate the concept, and many liberal democracies (e.g. the US, UK) don't really abide by the UN charter in lots of ways, or don't have them constitutionally enshrined.
I think in reality, the line between well-functioning liberal democracy and scary dictatorship is really thin - and states cross from one side to the other all the time. For instance, Montana in the USA imprisoned people for saying anything against the US government in the first world war.
India has obviously been flirting with some scary ideas for some time, most notably with the treatment of Dalits and Muslims - but it's hard to see this as just a BJP problem. I think the BJP make the whole situation worse, but I just don't see how you could avoid this kind of thing in a normal capitalist democracy with extreme inequality and poverty. It's like in the US south during apartheid. The only way the ruling group could secure anybody's support was by convincing their poor white workers they had more in common with rich white men than poor black men.
Unless you neuter inequality, social divisions - caste, gender, race - are always going to be an easy way for the rich to ensure the poor don't join forces against them. So secular, liberal democracy in such a state is just a moment between various modalities of illiberal ethno-nationalism.