Bendtner was an unused substitute in the win against Stoke City at the weekend and Wenger says the striker now has a chance to prove his quality.
"He had nearly gone somewhere else [in August] and in the end he stayed because it didn't work out and we needed him here," the boss told Arsenal Player.
"Now he can convince everybody. We are open-minded, we believe in his qualities. I personally believe in his qualities. It's just down to attitude and fighting [spirit]. When he has that, Nicklas can be an unstoppable striker. He gets his chance. Our job is about that. Take your chance.
"Fans forgive you everything as long as you produce the performances on the football pitch. That's what people want. I think our fans have a positive attitude towards Bendtner and they will be behind him. Only you can create that with your performances."