Random weird question lol?

I was watching this Spanish show & this mom has a diabolical child. He was born that way but he is extremely rude & does not care to build a relationship w his mom. He wants to do nothing more than kill or destroy stuff. The mother is extremely nice & wants to built a relationship w his son but gets made fun of by him. It convinced her she was was not meant or fit to be a mom. The mom dreamt he was a serial killer when he got older so she went to seek help for him not to end up that way. In the end, he does get better & now knows right from wrong. This show got me thinking lol. I feel like this might happen to me when I have a child of my own because how I see it is stuff like this happens to like nice people I suppose. I wouldn't know how to deal with this kind of behavior & I'm not sure if I would even continue to love my son. I dnt mind the typical child like behavior but I suppose I cannot deal with diabolical children who are predicted to grow up being serial killers. I can seek help but before realizing that, I feel like it might convince me that I can't be a good mother. Of course, this is just a mere rant but that's one thing that scares me about having a child since some of them are born this way lol. Whats one thing that scares you about being a parent lol Any comments or thought are welcomed :)