Simplify the following text for a Grade 7 native English-speaking person.
Original: At the time there was a feud between advocates of the music of Wagner and Brahms ; by aligning himself with Wagner , Bruckner made an unintentional enemy out of Hanslick .
Simplified: Hanslick said that Bruckner composed like Wagner , but although Bruckner had learned from Wagner he did not simply copy him .