My guess goes along Clif High's line of thinking. They were ready to push all the "MAGA bad" etc. but noticed this draws public attention to guidelines themselves, and pushes even sheeple to question what guidelines said (wut-wut-wut? kill the rest of humanity? enslave survivors?) and who erected the stones and whatnot. So they needed to memory-hole it ASAP. Just like the DC truck bomber or lots of other poorly thought-through false flags.