How is Dark Messiah connected to Heroes of Might and Magic?

Did you know that he was defending himself? In one of the videos, when Railag confesses his love for Isabel, he says that he feels very sorry because Nicholas attacked him when he was leading troops out of the Empire. Or do you think he should have let Nicholas kill him? He did it in front of the succubus because he trusted Biara as his right hand. And the fact that Isabel is an idiot is obvious anyway. But I already said that you can’t control your heart!