He was also a Zionist. His Twitter account was saying how lucky some Syrians were to now be part of Israel.

A lot of commenters are going to be really embarrassed after what they wrote.

Or, well, they should be, if they have any dignity or decency.

It does:

Some German media pointed to the suspect’s past social media posts in which he reportedly expressed views critical of Islam and had even warned of the “dangers” of an Islamisation of Germany.

In the CBC news alert they only mentioned he was from saudi arabia

I assumed he was an incel.

Hypothesis (shooting from the hip here, apologies if I miss by a kilometer):

• an ex-muslim radicalized as an anti-islamist authoritarian rightwinger goes into a mental health crisis
• his ideology prevents him from seeking help or treatment
• being angry about everything, decides to take random people with him in his suicide by cop
• tries to win his favourite party an election by committing a terror attack typically associated with islamists
• remains alive to face trial

Additional speculation: his former home country (Saudi Arabia) - known for sending teams of assassins with bone saws to kill dissidents in embassies when they apply for a passport - warns about the man, but nobody takes Saudi Arabia's warnings seriously because they're a tyranny that kills people. The warning gets thrown away along with loads of false warnings by Saudi Arabia.

As for news, here's another primary source:

https://www.spiegel.de/panorama/justiz/magdeburg-news-polizei-geht-von-einzeltaeter-aus-hinweise-auf-zweites-auto-nicht-bestaetigt-a-16214d4b-1014-4648-b32a-82d11b748364

A man drove a car into a group of people at a Christmas market in Magdeburg early Friday evening. According to SPIEGEL information, there are at least five dead, including a small child. According to official information, at least 60 people were injured, including 15 seriously injured.

The driver of the car was arrested after the fatal drive. He is 50-year-old Taleb A., a doctor from nearby Bernburg. He was born in Saudi Arabia and came to Germany for the first time in 2006.

The police currently have no evidence of accomplices. According to information from security circles, the suspect is not known to be an Islamist. He appears on the Internet as an ex-Muslim and opponent of Islam. The background to the incident is still completely unclear - just like the possible motive.

SPIEGEL research has shown that Taleb A. openly sympathized with the AfD online. Read more about it here.

...but the link noted as "here" is unfortunately paywalled, so that's where my data ends.

He was apparently an angry right-wing nut who had turned against Islam.

And the worst part is: The murderer achieves every goal they sought to.

Assuming an islamist motive, which is highly likely based on past attacks, there will be a significant increase in anti-Muslim discrimination. And islamists despise nothing more than Muslims successfully integrating into another society. After all, which cult does NOT prey upon vulnerable people and who is more vulnerable than someone experiencing constant discrimination?

ETA:

Turns out an islamist motive is highly unlikely, after other commenters pointed to an article that found the murderer shared anti-Muslim, far-right content online. Despite the tragedy, I'm genuinely relieved. This could've had devastating effects on the upcoming election.

Library democracy wrings its hands and lets extremist ideologies fester, both through being too weak and placating to act at home and too weak to rein in abuses against Muslim nations abroad.

Not sure what a "library democracy" is supposed to be, but the rest of that sentence does not make sense in this context: the attacker is a rightwing nutjob who liked AfD and Musk posts, not a djihadist or anything like that.