For serious discussion of the controversies, approaches and enigmas surrounding the origins and development of the human species and of human civilization. (NB: for more ‘out there’ posts we point you in the direction of the ‘Paranormal & Supernatural
’ Message Board).
It’s apparent that the document simply doesn’t provide the degree of specificity about the event that you require to make an assumption about intent and probable outcomes and as such perhaps it’s best that you not draw conclusions about motivating factors like that it was a problem of architectural concern or a reaction to fear and/or paranoia about an unknown possibility. That is if you’re interested in being intellectually consistent with your argument. ;-)
Besides your statements and questions open the door to a theological discussion about the alleged god’s relationship and expectations towards humanity which I assume is of little interest to you at this time. I trust you will let me know if I am wrong on that score.