the book seems to actually be fairly average and the line isn't so bad- maybe it just triggered a fear inside of you that you- or possibly someone else- might one day kill your parents or your friends-
if you love your parents then don't worry about it and don't doubt it- even if they were to one day be struck down i'm sure it won't be you so you have nothing to worry about
if you love your parents then don't worry about it and don't doubt it- even if they were to one day be struck down i'm sure it won't be you so you have nothing to worry about