Kshama shobhatee us bhujang ko jiske paas garal ho.
Usko kya jo danthin vishin vineet aur saral ho?
Meaning:-
Forgiveness suits that serpent which has poison.
How can it suit that, which is toothless, poisonless, humble and simple.
Bani is always treating Jai Walia badly. Rarely anybody will tolerate even a part of what she has done. JW is fully capable of retaliating. But he is letting Bani do whatever she wants. It is being depicted as his love.
People will love you just because you tolerate everything. They will consider you weak. Even if you forgive them, they will not think that you have forgiven them. They will think that you are not capable of doing anything.
But if you show to them that you can teach them a lesson. After that if you forgive them, they will know that it is forgiveness.
If JW loves Bani so much that he does not want to hurt her, then fine. But the concept being shown in Kasamh Se is completely illogical. The illogical concept being shown is that by tolerating everything done by somebody, you can make that person fall in love with you. On the other hand, if it is shown that JW proves to Bani that he can revenge but still does not, then I will call this a good concept.