I think such a complaint would be suitable in the Meta board rather than Reputation because it involves forum moderation policy.
Yeah, that was the first thing I thought when I clicked on this thread.
OP, sometimes posts get deleted for reasons you'll never figure out. Unless the moderator who deleted it checks in here and tells you why, all you and anyone else can do is guess--which is wasted mental energy IMO. Since your deleted post wasn't so important that it
absolutely needed to stay in that thread, my suggestion to you is to just let it go. The only situation in which you need to be worried is the one in which a lot of your posts are being deleted--but that usually happens with very low-quality posters, spammers, and the like. You don't fit into that category, so let it just roll off your back and move on.
A lot of us have had posts deleted where we scratch our heads and wonder why. I've had my share over the years, and creating threads like this is a waste of time because 1) You probably won't find out the real reason, and 2) It's not going to change anything as far as the deleted post goes.