Regardless of the merits of this law, your take is very simplistic. All laws are trade-offs and they achieve their purposes imperfectly and with side effects. Not to mention the administration of the law (the justice system) is far from perfect.
Just to give a perhaps contrived example based on what the GP said. We can imagine that companies start worrying about the caste of their employees (or just if they're indians) when they otherwise wouldn't, and constrain their actions lest they be exposed to higher legal jeopardy down the line.
How is my take simplistic? I wasn't even really arguing in favor of the law, nor was I opining on the concern you raise about the chilling effect on companies in terms of hiring Hindu employees (I think your point is reasonable).
I was merely pointing out several inane things about the post to which I was replying. That post raised no reasonable arguments for its position, and showed a lot of ignorance about what the law would actually do.
Just to give a perhaps contrived example based on what the GP said. We can imagine that companies start worrying about the caste of their employees (or just if they're indians) when they otherwise wouldn't, and constrain their actions lest they be exposed to higher legal jeopardy down the line.