Spartak Moscow were ordered to close 500 seats and to display a banner with the words "Equal Game" on it after fans were found to have made monkey chants at him.
"It's not really a punishment, is it? It was nothing really, just a slap on the wrist...it should have been more, a whole stadium ban," Brewster said.
"I love the game. I'm never going to stop loving it. It's just disappointing to know that it's still in the game.
"If it wasn't in the game it would be so much better."
Liverpool manager Jurgen Klopp praised Brewster's courage.
"Obviously, it happens all the time and I'm happy enough that he has been brave enough to do what he did," Klopp said at a news conference.
"It's such an important thing. I cannot believe that people still have these thoughts in their mind."