Taleb al-Abdulmohsen, 50, is the suspect in custody. He is a Saudi native who traveled to Germany in 2006 reportedly seeking asylum.
The Daily Mail reports that around 700 "far-right" demonstrators assembled in Magdeburg, where the attack took place, holding homeland flags and signs that read, "Remigration Now."
The protesters marched down streets yelling, "Anyone who doesn't love Germany should leave Germany," "Migration kills," and "We must take back our cities, our villages and our homeland." The outlet reports that minor scuffles with police took place as they escorted the protesters through the city in full riot gear.
One of the protesters was identified as Thorsten Heise, a right-wing German political figure was captured yelling "Deport, deport, deport" and "Resistance."
While it was initially believed that the attack last week was an Islamist terror attack, the German interior minister said that al-Abdulmohsen was an Islamaphobe himself, despite his prior claims of being an ex-Muslim.
In the days leading up to the attack on his suspected X account, al-Abdulmoshen posted a video claiming that Germany was at fault for the death of ancient Greek thinker Socrates in 399 BC. He claimed that a USB drive was stolen from his mail. He also said, "The Germans are responsible for what I am facing."