I really don't wanna get into any argument and by what I'm going to say, I might sound like an immature moron to you people. But I'll say it anyway, it's not like someone will beat me up for it.
So here I go.......
We are being too harsh on Raghav. I know what he's done is not something a sane person would do. But... Did the guy appeared sane to you?
Starved too long for a word from his mom, a trusting glance from his sister, warmth of a family snatched from him. And finally when things were going fine, happiness was finally in reach, everything turned into a god damned mess. He lost it, we all do at some point.
Would we have condemned him the same way had he done that to that girl in picture? Maybe. Maybe a little less for the girl was actually at fault. Then, according to Raghav it was deliberate move on Pallavi's behalf too and she's not an innocent. He's not seeking vengeance but just attempting to avenge the pain caused to his family.
Raghav's action promotes violence and male MCP behaviour (I don't know what it means) but that's where viewers discretion comes into picture. Going by "influence logic" and "impressionable mind theory" we'll have only spotless white "Gopi vahu" type of characters. And God save us from that torture.
I know we are being judgmental because to us Raghav is a character written by a writer in full control of his senses. But to that writer Raghav is a human who is flawed as a human can be.
His family (what is left of it) and his trust are his trigger pionts which ,when pressed made him feel scared. That fear produced aggression that completely corrupted his sense and clouded his judgment of right or wrong.
So the conclusion is Raghav's only fault I see is his misunderstanding because of the pictures. And he, unfortunately, didn't bothered to investigate it a little bit. But with a hospitalized mother and burning rage I wouldn't have bothered with the investigation myself.