Turn off all comments in Facebook Group as admin

To the best of my knowledge there is no way to turn off all commenting by public group members for all posts in a single main setting – this is unacceptable. We demand the ability not only to block all posts by all members at any given time and prohibit all members from commenting on all posts for immediate measures to control group sabotage in the current vigilante political climate. Failure to implement this measure immediately will force admins to shut down all groups to stop excessive constant harassment. The only measure fb has in place to stop comments on posts as admin is to turn off commenting one post at a time. The feature needs to be expanded with an option to shut down comments on all posts in the main settings as a temporary emergency measure.