Qanon believers could not believe nothing happened during Inauguration Day.
They believed all the Democrats and Republicans gathered for Inauguration Ceremony were rounded up and sent to prison (or even killed by National Guard soldiers). They have been brainwashed to believe all Democrats are Satanic worshipers and killing children by Qanon.
I believe Trump and US Military had actually plan for a military coup on that day, but somehow they could not execute their military plan.
There was a rumor on Qanon believing Youtuber saying “All the fences around the Capitol building were bolted from outside in order to round up all the people attending Inauguration ceremony.”
I believe Qanon has started as COBRA. Drake, a military guy started posting information on web around 2011. Qanon is the US Military propaganda to make US divided and unstable and to create civil war.