If anything violence towards the capital building is MORE justified that towards a random business district because
(1)the actions taken place in the Capital is what they were actually protesting . What did a downtown business district do to anyone?
(2)No one’s life (other than the police killed and those who the police killed) gets ruined if the capital is ransacked. Plenty of people had their lives ruined by BLM ransacking business or residential districts
(3)The capital has a police force capable of defending themselves (despite their horrible failure to do so this time). Joe Schmoe small business owner has no way of fighting back against the mob.