Ryan has called for the fans to get 100% behind his team, but acknowledges that they have the right to make their feelings known from the stands.
"We don't want our guys getting booed, especially from our fans because we all wear green and white, including the fans. The game is tough enough. We need to support each other. That's probably where [Cromartie] was coming from," he told reporters.
"We can't worry about what happened in the past. It's a brand new year. There should be some excitement based on that, not looking at the negatives. I like focusing on what's in front of us, the positive.
"Of course, we'd like to have a backing from 100% of our fans, but our fans can do what they want. They earned that right. They purchased a ticket and they can do whatever they choose."
Sanchez committed a league-high 52 turnovers in the past two seasons, including throwing three interceptions in his last appearance for the franchise.