I thought exactly the same thing as you when I watched the episode. Seriously. I guess that's why the violence was shown in detail. It was gruesome and horrific, and we were meant to be swayed. This show is going to constantly swing us back and forth between hoping for Rishabh and Madhu to get together, and dreading it.
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As for those who say to leave our minds behind when we watch this show, no thanks. Good writing is there for a reason. For us to enjoy and to challenge how we think and what we value. If we don't engage that part of our brains at all the value of the show is lost on us.
And for Rishabh's "redemption" track (I hate that word btw. I watched Gossip GIrl and I was NOT a Chuck fan, but for some reasons the tweeny boppers that worshiped him thought this was the magic word that would make everything alright) I don't think its so much CV's justifying Rishabh's horrible actions, as it is Rishabh evolving as a person.
The show has not used his past to justify his actions, and I would prefer it stay that way. There is no justification for what he did, only an explanation. And after his behaviour is explained (by showcasing his family etc), the story should focus on him changing and growing. He has acted heinously and there is no apologizing for it. His only redemption will be his growth and how he responds to the feelings Madhu is arising in him.