The horde of rioters that lay siege to the DNC headquarters are not insurrectionists because the DNC is not part of the Federal Government. It's a private political party and private property, so, they are ordinary criminals.
We should not elevate street thugs and wannabe terrorists to be poltical martyrs.
They are wannabe terrorists because they want to use mob violence, or the threat of violence, intimidation, and fear to achieve their political ends.