Suffering injustice may be acceptable with the Lord but it is not required by the Lord. Otherwise, the Lord will have to handle all the evildoers in the world by Himself. This is not the way things are done in the age of Grace.
When Christ sits upon the throne in jerusalem He will rule with a rod of iron and so dispense justice. But that kingdom has not yet come. In the meantime good men must push back against evil men.