- Click on the big button in the header next to ‘Local’ that says ‘All’.
- Click the drop-down field directly next to ‘All’.
- Click ‘Active’ from the drop-down list.
- Click on a thread loaded on the page.
- Reply to users in that thread.
Congrats! You have successfully done a brigading! Pat yourself on the back! Next seminar, we will be covering how to subtly deceive strategically-important redditors with a simple tactic they don’t know of called ‘whataboutism’ 
Edit: meant to post this in the secret group chat where we coordinate the fall of the west. Sorry y’all. My bad 
We would defed from them for saying reactionary shit. It's the content of their posts that would be a deal breaker, not just the existence of their comments in our threads. We wouldn't weasel our way out of this by citing bullshit internet rules of civility, we would outright admit that the separation is ideologically motivated.