How or who to ask why a post has been removed?

Do you authorize me to post the links to those threads and the content of my deleted message so that maybe you can explain me why they have been deleted?

You will learn that a) we can't "authorize" or explain anything as we are all just end users like you and have nothing to do with running these forums and b) the hosts are the decision makers and c) the last sentence in the ToU states the defining terms - they can remove any post for any reason. Here is a link to the ToU:

https://discussions.apple.com/terms

You will also find an email address for the hosts in that document. You can ask them; however, do not necessarily expect an explanation or a way to "negotiate" the decision.

Only community hosts can remove posts. And they can do it for any reason. Read the TOU for these communities.

If your post is a response to a post that was removed then your post is also removed as a result of the original removal. It would make no sense for your post to remain if the post you responded to was no longer there.

For example, if your post above is removed for whatever reason, my response will also be removed. I will not receive anything explaining why my post was removed. It only makes sense that my post would make no sense if your post was removed and mine remained.

We are users like you. Posts can be deleted by the hosts for any reason. There is no process to question the reasoning that led to removal.