Earlier quoted context omitted.
India flat out has laws that prohibit hate speech and creation of racial disharmony of all sorts. I'm not sure if an Indian court has ever dealt with holocaust denial in particular, probably because there's barely any Jews in India at this point, but Indian limitations on speech go far beyond the genocide-speech laws that exist in Europe. Same of course is also true for Singapore and most other Asian countries.
You may want to check out the Indian supreme court opinion on the topic. https://en.m.wikipedia.org/wiki/Hate_speech_laws_in_India
"Whoever (a) by words, either spoken or written, or by signs or by visible representations or otherwise, promotes or attempts to promote, on grounds of religion, race, place of birth, residence, language, caste or community or any other ground whatsoever, disharmony or feelings of enmity, hatred or ill-will between different religious, racial, language or regional groups or castes or communities, or (b) commits any act which is prejudicial to the maintenance of harmony between different religious, racial, language or regional groups or castes or communities, and which disturbs or is likely to disturb the public tranquillity, . . . shall be punished with imprisonment which may extend to three years, or with fine, or with both."
That is without a doubt very explicit and much further reaching than any European legislation. And from the cases actually given in that article also practised as such.
Just to take one example, but there are many more in that very article
In 2007, R.V. Bhasin's Islam - A Concept of Political World Invasion by Muslims was banned, and house raided, in Maharashtra on grounds that it outrages the feelings of Muslim section of society.[12][13][14] In January 2010, the Bombay High upholds the ban imposed by the Government of Maharashtra.[15]