The court hearing just ended. The attacker was a Polish guy who was blackout intoxicated by alcohol and drugs during the incident. He is known by local police from previous episodes in which he has been mentally "unhinged". He does not recall the episode other than being positively thrilled to meet the prime minister. He was ashamed of his actions.
So, no political or personal motivation, just a local loony.
He will now be put in pre-trial detention for 12 days.