Why is pedophilia such an awful thing in western cultures?

I said western because I am not sure about other cultures. I know it hasn’t always been this way.

Please don’t show why you specifically hate pedophiles, but answer why its such a cultural thing to hate them. Other criminals kill pedophiles in prisons.

And finally, do you see a day in the future when pedophilia is accepted, just as other non standard sexualities are becoming more accepted today?

And no, I don’t believe in an absolute morality, so don’t say its just “wrong”. Also, I am not a pedophile, I have just always wondered about this.