Someone prepared for this discussion by cracking their Poli-Sci 101 textbook last night!
First things first, it would help everyone in America to understand that there are three branches of government... and to be able to name them all. Something less than half of Americans are able to do, apparently.
I don’t disagree.
If someone asked me to draw the line between reactionary and conservative, the reactionary is willing to break the law and/or use violence to achieve their political objectives, whereas the conservative isn’t.
Same for radical and liberal, the radical is willing to break the law and/or use violence to achieve their political objectives. The liberal isn’t. So, it’s fair to label some (not all) BLM/Antifa as radicals if they took part in violent riots or extra-political takeover of power (CHAD/CHAZ).
And if the political spectrum is a circle, with the 12 o’clock position being a centrist, the ultra-radicals and ultra-reactionaries meet in the middle (at the 6 o’clock position) where they are both basically promoting anarchy. The ultra-reactionaries in this case who invaded the Capitol wanted to completely subvert and overturn the lawful due process, and therefore, the elected government.
As a comparison, the legal fight of Bush-Gore in 2000 did not involve radicals and reactionaries, because it all played out in the courts and not in street violence.