Love makes us do crazy things.
I know people feel that RKB's character is being butchered to elevate Mani's character but let's evaluate today's episode with a perspective that our beloved RKB is now in LOVE and that changes everything!
1) Why is that Raman was calm during Amma's accident but behaving like a brute now? - I think RKB has evolved as a person after Ishita's entry in his life, his relationship with Ishita is also evolving every day. When Amma's accident happened, he cared for Ishita but he wasn't in love with her, he cared for her as his children's mother and wanted to make sure she is okay as a friend. He was calm and composed trying to be a support system for Ishita. Today his support system, HIS Ishita is in trouble, and like any loving Husband he loses his cool.
He had asked Ishita after the accident track: "Adi mere kamzori hai, par tum mere himmat/takat bano"
Today, his LOVE for Ishita is as deep and great like his love for his children, how would we expect Raman to react if Adi or Ruhi were in trouble? Would he be sane or lose his cool, similarly his outburst today is a sign that Ishita now holds a greater significance in his life and he cannot see anything happen to HIS wife, and now HIS LOVE.
2) Why is Mani shown to be so Mahan knowing all about Ishita and RKB is being sidelined? - Let's ask ourselves, have RKB and Ishita been good spouses? The answer is a resounding NO! Raman and Ishita are lousy spouses, they are good supportive friends, amazing kids to their parents, ideal siblings and doting parents but they are horrible spouses. And I am not even talking about the physical intimacy, they never evolved as partners because they stopped themselves at their role of being a parent to Ruhi. Did Raman ever wonder about Ishita as a person, her likes, her dislikes, her hopes and dreams? Forget her likes or dislikes, did he ever make her feel comfortable for Ishita to confide in him about her past? Yes they are happy now in their current status quo of being good friends and being supportive to each other but it ends there.
This development will only make Raman realize the void in his relationship with Ishita, he needs to be a better husband to his wife whom now he LOVES. He needs to know his WIFE Ishita, her past, her hopes, and her desires!
A sane, educated, CEO Raman would not have lost his cool at the hospital or felt bad about not knowing enough about Ishita, but now this same Insane, educated, CEO RKB is in LOVE!! And Love makes us do crazy things!!
"Love is friendship that has caught fire. It is quiet understanding, mutual confidence, sharing and forgiving. It is loyalty through good and bad times. It settles for less than perfection and makes allowances for human weaknesses." - Ann Landers
So our Ishra are in love, and their love has settled for less than perfection and allow human weakness, and RKB's weakness is his anger in times of distress then so be it.