During the operation, four police officers and two firefighters were injured.
The protests erupted after a government decision to phase out a tax break on agricultural diesel.
Thirty-four percent of men aged 18-35 admitted to being violent towards their female partner in the past.
The shooting happened in Hamburg.
The group had set itself the goal "of triggering civil war-like conditions in Germany by means of violence".
One active soldier and several reservists are among those being investigated.
The MP left his wife after 16 years.
By 1985, Agent M was a seasoned double agent.
He crashed near the war-ravaged Kaiser Wilhelm Memorial Church.
