Thoughts on the scenario after completing "Hammers of Fate".

I also don't understand how Isabel could fall in love with Railag – the one who killed her first love, Nicholas??? Yes, Railag apologized, and he saved her many times, but I still don't understand how you can forgive him for that??? In my opinion, after everything he did to the empire and Nicholas, he shouldn't even dream of Isabel ever loving him. After all, it was obvious that Isabel loved Nicholas. If she could, she would have resurrected him a second time. In my opinion, Agrail killed Nicholas simply out of envy because Isabel loved the latter. And in general, judging by her oath after Nicholas's death, she was supposed to hand him over to the inquisitors and then incinerate him. But after a few explanations, she forgave him. I don't understand how that's possible...