@bold, this cracked me up but it's a great point. He wouldn't have the same excuses in that case and would have taken a different route.
He hates Raghav with all his heart and soul because he's jealous of him man to man, and then because he realizes that it's Raghav's entry and constant presence in Pallavi's life that influence her and eventually helped her fly away. The Raghav Rao he met from day 1 till now has never had filters, barriers, or excuses for what he does. He is open, direct, honest, and very clear about what he wants, without the need to hide behind the facade of goodness or social norms. This isn't something that Sanki can do because he does care what people think and what happens to his 'izzat'.
The best thing about the almost-feet washing episode was that even if he tried his best to break Raghav's 'ghamand' to prove that his 'osool and naariya' about life are not just right but far superior to Raghav's, he was shown his place very well. That's why Raghav's body language as he bent down to wash Sanki's feet was never deflated, defeated, or even the slightest bit submissive. Physically he was on the ground but his dignity just soared and soared. I don't think Sanki expected him to call his bluff as his arrogance soared, and when Raghav did, he basically put Sanki back on earth where he belongs. It was one of the best scenes for me on the show.
Raghav's a good example of apni izzat apne haath mein hoti hai. When he himself has no embarrassment or shame, and rather has pride in doing something to make his family happy, how can that act defeat him?