You're assuming that all of haejin's rewards were coming from a single user before the flagging wars. Do you have proof that this is the case? I've never seen any.

Yes, but first, I want to clarify that not all, but most of his rewards before the war came from rancho.

I show his first upvote as being 12/9/2017. This is confirmed by haejin himself via a transfer memo on that same date thanking him and verifying that he knew his steemit name.

Even if he is right, he is not helping his cause and he is certainly not helping the platform.

Well, I agree that actions like taking your rep down do nothing but galvanize the resistance against him and the cause. Of course, without him, I doubt there would be a cause.