German interior ministry has to be a grotesque, politically correct worse than useless beurocracy. German intelligence agents had to be aware of this co pilots recent conversion to Islam and involvement with a radical jihadist mosque. If they were good cops and not hindered by politically correct nonsense and regulations, they would have notified a reliable contact at Lufthansa. The situation could have been dealt with quietly and this particular tragedy would have been avoided. Sadly it is probably not much different in the West especially in the US after six years of Obama delusions.
I have not seen the muslim angle confirmed. So far it’s only a blog entry. I’d withhold judgement about whether or not the authorities failed until actual media start reporting it.