> Good questions are : Who got it up there? How? And when?
It's a damn shame Egyptologists aren't interested in such questions. If the answers were all available we might be able to see the big picture. It would be hilarious if their assumptions were right all along. Of course they are too illogical to be reality though.
I certainly haven't figured out how it's in the condition it is today but I am still assuming that what we are seeing is the natural damage caused by an earthquake and then systematic removal of stones. Seen in this light my best guess is the top third (below the remaining casing) of the pyramid was shaken off after being severely damaged in the p-wave and then people removed the rest by scaling the corners of the pyramid from the bottom up. When they got to the top of the loosened casing they simply slid them off down the sides to the soft sand below.
There's a lot going on here and a lot of data that hasn't been gathered so it's much more guesswork than should be necessary. If the supports are original then a lot of the questions and the big picture might come into view.