As I have said before it is not a business, which a football club is, to police crimes but the Police. Their job is do the best for thei business and if that means playing someone accused of a crime, then they are acting in the interests of the business.
To get them to change their approach it needs action from employees, other players objecting to play with them or supporters refusing to go to matches or affecting the match by abusing the players by chants or booing. Only this type of action will get them to change.
whilst I do not have a problem with Woolwich playing a suspected rapist, I do hope it rebounds on them, by player unrest and supporters of both theirs and the opposition affecting the result.