That's exactly what you are doing.
If you were being objective you would argue from both sides, as opposed to what you think Jeremy Bamber felt that night.
No, I'm not. First, your assertion is plainly not true. I have already acknowledged various points that harm Bamber's position. If it becomes clear to me that Bamber's position is difficult, I will say so, and I have already mentioned that possibility above.
Second, my purpose here is to assess, so far as my modest abilities allow, whether Bamber's conviction stands up to scrutiny. The position is that Bamber stands convicted, so an objective examination of the case (from the point of view of legal safety) does mean attacking the Crown's case in order to test it. Also, objectivity does not necessarily mean arguing both sides equally. I've explained above that if a pro-Bamber assertion is made, I'm going to tackle it in order to test it.
Again, I am not taking sides about his guilt or innocence, simply because in the absence of incontestable either way, we just can't know. Therefore, I can't exonerate him, neither can you; nor can I pronounce him culpable, and neither can you.