He was aware of how dangerous these things could be, but he had witnessed firsthand how unambitious she was. She was just a child in need of love and attention; she did not deserve the treatment she received three years ago.
What enraged everyone was the fact that, even though there was no evidence that Vanity was the imposter, Nolan was so bold as to have her killed even though he was aware that she was Chandler's wife. Wasn't this a declaration that he didn't consider the Wagner’s to be a threat? This was a slap in the face to their family name and heritage.
It was very frustrating and infuriating to be looked down upon by a character who didn't even qualify to be one of the main characters.
"You did well; if anyone dares to try that again, I hope it does not happen; just do whatever you want to them and show no mercy," Kelly's voice was filled with sadness and rage.
“I didn't know, I'm sorry,” Chandler apologized as he embraced his wife.