Just to Clarify:

What is legal definition of insurrection?

insurrection, an organized and usually violent act of revolt or rebellion against an established government or governing authority of a nation-state or other political entity by a group of its citizens or subjects; also, any act of engaging in such a revolt.

It doesn't matter that you were "peaceful" if you participated in this action, hence, the sentencing. If you want to see harsh, consider those sitting in Guantanamo who were never convicted of a crime, or terrorist act, but are still being held after 20 years.

Fled wrote:

Shallow twit.

Indeed!