Benitez claimed to have not understood expletive-laden chants which included the words: "You're not welcome here."
"I was asking: 'What were they singing?"' he said. "I don't care. I'm just focused on the game."
When informed what fans had chanted, Benitez admitted he was not surprised following some of the questions at his unveiling on Thursday.
"It was a surprise for you after the other day?"
And the banners, which read: 'Rafa out'?
He said: "How many people do you need to write a banner? Just one. Then two holding it.
"If we start winning games, they will come on board and they will see I'll try to do my best."
He added: "The main things is that the players are focused on the games. If they are, it'll be fine.
"I have confidence we will do well and win games.
"Some of the fans will realise it's not the way to support their team."