There was no moment from the eternal perspective; but for creation it did destroy timelessness [probably more accurate to say it began time]. The best estimate is 13.75 billion years ago.
I don't follow the logic that the infinite/eternal causing the finite to exist necessarily destroys itself or it's attributes.
Haven't really thought it through but, we could perhaps take "laws of physics" from your #1129 as an analog. They continue unchanged - and must continue as they are in order for the universe to work - new creation to become part of our finite existence.
There can be no eternal perspective that includes creation unless creation itself is eternal.