You think the G4 ponies would be horrified by the G3 ponies and hate them? Get real, if you really paid attention to the Mane Six's characters, you would know that they would neither commit nor stand for this hate.
"Also, if G4 Rainbow Dash was real I have every faith that she'd not only be okay with G3 Rainbow Dash, but she'd also put a stop to the bronies hating on her."
"My friend, if I knew how to draw, I'd make a picture that would show the Bronies exactly how I think G4 RD would react to G3 Rainbow's tears."