Shin’s Actions

I understand Johnny suspecting EJ of being involved with Li & Rolf. Johnny knows that EJ has the M.O., I get that, but what I’m getting at is that there’s nothing besides the M.O. that has Johnny believing that EJ has aligned up with the both of them, so with there being nothing besides the M.O., where’s the rest of it that has Johnny being convinced of it & if there is no rest of it that has him convinced, then does Johnny believe that EJ gave the orders to Rolf to give the go ahead of frying JohnEndy’s minds, especially when Johnny has no clue that only Shin gave Rolf the orders to do have it done?