The instigators were BLM/Antifa. Just like they were at the 2015 / 2016 Trump rallies.
BLM activist egged on Capitol rioters: Left-winger who told CNN he was there simply to document the siege is arrested after video shows he smashed window, wore gas mask, told rioters he had knife and shouted ‘we got to get this s**t burned’
https://www.dailymail.co.uk/news/article-9149861/Left-wing-activist-arrested-relation-siege-Capitol-Building.html
CNN-NPR Photo-Journalist Jade Sacker was Embedded with Antifa Leader John Sullivan During Siege of US Capitol
https://www.wcbm.com/2021/01/15/cnn-npr-photo-journalist-jade-sacker-was-embedded-with-antifa-leader-john-sullivan-during-siege-of-us-capitol/