I’m gonna come off sounding completely callous here, but my take on it is that it’s a good thing your nephew was traumatized, and other children should experience the same feelings of shock, disgust etc. That way, they’ll remember that experience, and, God willing, do something to stop abortion when they’re older.
Yup, you sound completely callous.
Five years old is a bit young, especially since he is growing up in a Pro-life household anyway.