Shutting down the operation of government meets the definition of insurrection. Also terrorism as the object of shutdowns of highways, airports and certainly a state capital is to impact government policy.
Except that the Jan 6 protestors didn’t shut down the Capitol, the Capitol shut down and then told cops to go open the barriers and let the protestors in. Cruz and another fella were arguing in session to stop the certification, and the left of course refused, and then shut down in order to stop Cruz and the other fella from further making their points according to a report on what happened that day (the article was posted on fr back then- I can’t remember what the title was now)- so supposedly, according to that article, it wasn’t the protestors that caused the shutdown- it was a planned deal where the left sought to entrap the right by allowing them to enter the building