Benitez was booed when he took charge of his first game against Manchester City and has been the subject of abusive chants ever since.
But Zenden told the London Evening Standard: “The situation that occurred has not always been easy, but we know that when the results are there and you do well, everything will be changing for the better and be ok.
“If we do four, five, six good things and one bad, it seems that the one thing that is bad is measured in a much bigger scale than the five or six things that happened before that.
“For the managing department it is just a matter of getting on with the work and making sure you get the results. The only thing you hope for is that you get some support from the fans and everybody else because in the end that is what will help the team.
“I’m sure it is just a minor group that thinks differently. It is just a matter of time that there is maybe a change to a more positive energy.
“It’s not always been negative. The fans in general are very good. In general they support the team, the players and the manager. There is always a minority that you still need to try and convince.
“It’s important to support the team. If it comes to the situation where the players feel more pressure than is needed, that’s not good for anybody at the club is it?”