We understand that you may not agree with everyone in the communities’ views. If you’d like to block an individual, you may go to their comment or post, and click edit/3 dot icon on the top right hand corner. A drop down with the option to block the user will appear.
Click on that and that users posts and comments will no longer be visible to you.
To unblock a user, navigate to settings > community settings. The user will be listed there for you to unblock.