the reaction of sajjan singh's family is based on the misconception/belief that Angad did more than just kidnap Pratigya. and i believe that they are more furious as they were unaware of this truth.
Krishna's words and expressions reflect more of the betrayal of loving someone. So i can see why he may not be as upset if anything more had happened with Pratigya. He may understand that if a girl is kidnapped that is not her fault.
any marriage alliance between two families is based on trust and truth. And in this case, if the takur family was not informed of this truth then indeed they were betrayed. I am also not able to understand Professor's thought process........ his telling the takur family that nothing had happened to pratigya simply appears to be an excuse. if indeed nothing happened, then why hide it? i do know that the saxena's believed that Kirshna had actually kidnapped pratigya so initially they did not need to say anything. But he should have mentioned something when he knew the truth.
Also, what is the professor's real reason for not telling the truth? that krishna will dissolve the marriage? well, does he not have the right to do so? he has gotten nothing in his relationship with Pratigya. you would atleast expect honesty and now not even that!
I do think that the producer has realistically shown the Takur famliy's reaction.
As for Krishna and Pratigya.... i think the creatives of this show are doing an excellent job. it is hard to only agree with one character here. both have made mistakes and both have redeemed themselves on various occasions. both are very strong characters and keep me intrigued and glued to IF and TV.