> J6 was an insurrection that should have been appropriately responded to with immediate and overwhelming national guard force (not necessarily lethal), not a protest.

This is incorrect. It wasn’t an insurrection but also not a legally protected protest. It was a riot. No one has been charged with insurrection, let alone convicted for it. That word has only been used by news media, politicians, and private citizens. The most serious charge was seditious conspiracy but only a few people (like five) were charged with that. Most of the charges were for simple trespassing since most people on the Capitol grounds were not involved in any conspiracy and weren’t violent or destructive either.

The word "insurrection" — according to most dictionaries, meaning a "violent uprising against civil authority or established government" or some variation thereof — is perfectly fine to describe Jan 6.

It has no legal meaning, so nobody can get charged for participating in an insurrection, but that is of course irrelevant to the question of whether the word is appropriate. There's no legal term for many words that we use colloquially or narratively to describe actions with which one may be legally charged with a crime. If you steal someone's wallet, you may be charged with "theft of personal property", not "pickpocketing", but what you did was pickpocketing.

The fact that most participants were not violent is of course a red herring. They participated in an organized insurrection involving trespassing, destruction of property, conspiracy to commit treason (many participants were actively looking for Mike Pence and the crowd was chanting "Hang Pence"), and so on. "I was only at the party to have fun" is no excuse if the party was an violent, organized riot. You are the company you keep.