You are changing the parameters of the original scenario, in the context of neck-exploding-chain-smoking-panic-attacking-melodramatic-wine-swigging Deirdre, Chazza was a nasty wee blighter in their eyes so the Street was better off without him.
In reality, if the situation was as per Soapland (one off etc) I would do as Deirdre, with a bit of rage a la Mount Vesuvius (Ken) but ultimately defend my child to the hilt. In context of paedophilia or rape etc, I would consider that society would be better off without them causing consistent harm to vulnerable individuals.