Why is it that evildoers who promote evil WORK harder at achieving their means than do the righteous who promote good - or so it seems?
Good observation. It would seem to parallel this observation, "...the people of this world are more shrewd in dealing with their own kind than are the people of the light," (verse 8).
Perhaps the key phrase is, "with their own?" Flesh appeals to flesh - and to the flesh in all of us.