They don't call it insurrection only because "seditious conspiracy" is the more legally accurate term, and the charge on which convictions have already been obtained. But ask a layperson to describe the difference and you'll get nothing. Even the US house and senate voted on impeachment for "incitement of insurrection" despite the legal distinction. Saying that it's "not insurrection[legal]" might be true, but HN is not a court and saying "not insurrection[common]" here is false.