The January 6th protest was milder than any of the hundreds of Black Lives Matter riots the summer before, and led to no serious destruction of Capitol artifacts. But the Democrats en masse pretended to be horrified. They denounced the protest as an “armed insurrection” and compared it to Pearl Harbor and 9/11 and other enemy attacks on the United States which resulted in thousands of deaths.
I don’t think the Democrats pretended to be “horrified’. I think they were worried that they had been found out and that many would disagree for various reasons. This is what happens when those entrusted with managing government think that the top priority is their maintaining power by pandering to fashionable coteries.