Point taken grindstone. Hitler started his official purges in 1933 (not 1934) but I hold to the view that absolute transparency on such crimes would have turned people against him.
As evidenced by the arrest of his co-conspirators and by follow up police raids in Australia, Tarrant belonged to a larger conspiracy and an organised political movement. Like minded posters on this forum are already at the task of painting the Christchurch massacre as a false flag or overlaying it with irrelevancies.