Oh geez, Rick… These guys sure like their echo chambers…

YeURRRPep, Morty. Duh… How else would CoOURRRRGHPOommunism sound like a good idea?

This is why they openly discuss the event and all the nuances that lead up to it. After all, it would only be guilt and shame that could cause an entire nation, as a matter of procedure, to deny that the events that day ever took place.