Why did Axel fight Xion in Twilight Town in Kingdom Hearts 358 2 Days?

Axel wants Xion to return to Organization XIII, but she wanted to return to Sora. At the same time, Xion pretty much wantedto be eliminated, because Namine told Xion that if Xion returns to Sora, she'd return Sora's memories so he can reawaken and destroy Organization XIII.