Absolutely, the reason why people don't tell things to Dutta was pinpointed by Nakku herself when she said that fear of his averse reactions is what plagues them. She couldn't have been more spot on about it.
Seeing the title of your post though (before reading its content), I thought of something else...that Dutta is indeed a 'pujari of truth.' All his life, he has given people the truth...no facades, no secrets, no surprises...he has worn his heart on his sleeve, been there raw at the surface for all to see without any disguise or apprehension. He is what he is. And so, he expects that people too show him their real faces, that they hide nothing from him, wear no masks, and even if they attack, it is from the 'front.' The way he opened himself to Nakusha today showed all of that...he bared his soul for her to see...and he expects likewise in reciprocation. That is the reason why he gets so wild, shocked and unstable when people betray him, why he has such a block against it...because he never even thinks of it as a possibility, that someone might not have been as honest to him as he was to them. He is the kind of person who thinks that the whole world is to him like he is to them. It's naive, childish, even more so if you remember that he is a don, but it explains why he is so unsuspecting and unaware of all that is going on around him. And even though it seems that this behaviour defeats common sense, there really are (rare) people out there with such an inherent nature...who turn a blind-eye to red flags believing in the 'goodness' of others, never even imagining that those closest to them could think of doing any harm or ever hiding anything. In many ways, Dutta is like a child...he doesn't hide anything, and when he finds out that someone else hid something from him...he doesn't know how to react, how to handle it like an adult, so out pours his inner fury and pain, his very first reaction without a thought. The more I think of it, he really literally is a 'worshipper of truth' in the truest form...for him, Nakku symbolized 'honesty' and he revered her for it...that was him being a 'pujari of truth.' When people violate that very trust and sincerity though, his punishment is to lash out at them, as hard as he can. And Nakku's truth has been the biggest possible violation, of all that he had come to believe in after being a 'disbeliever,' in love, in life, in God. Oh, he'll be furious, wrecked and wreckful, with more than valid reason to support.