It's his insecurities.
Raghav is pretty much insecure and afraid when it comes to his loved ones. Amma, Keerthi and Pallavi; he cannot take anything happening to them.
If Pallavi knows about Mandaar's intention and stays by his side, he would gear up. Again I think it will be subtle cause Aai is in consideration. Raghav really respects Aai.
Let's see what unfolds next.
Yep for sure. I touched on that myself on a lot of other threads. He has serious abandonment issues from when his mom left him and patching things up with his mom doesn't mean that they're gone. They're the underlying reason for why he reacts so impulsively, extremely, to protect and keep those he loves in his life.
I just hope he grows a little bit more to be confident. Its ITV so they won't ever mention abandonment issues, or show him going to therapy, so my last resort is that it just happens as he realizes his loved ones are here to stay.