Al-Abdulmohsen's account on X appears to espouse anti-Islam views. The biography reads: 'Saudi Military Opposition. Germany chases female Saudi asylum seekers, inside and outside Germany, to destroy their lives. Germany wants to islamize Europe.'
Posts include retweets of graphic videos, including one of a young Muslim woman purportedly being stoned to death 'because she had an affair with a young man outside of marriage.'
Another was a retweet of a post that simply read: 'Can you find one positive thing about Islam?'
In videos posted hours before the attack, he claimed that German authorities were opening his mail and stealing items including a USB stick.
'I consider the Germans, as citizens, responsible for the persecution I am facing,' he said in one video.
'Currently in this country, the nation that is actively criminally chasing Islam critics is the German nation', he said in another.
He also appears to be a fan of AfD. In June, he retweeted party leader Alice Weidel, writing with typos: 'The left are crazy. We need the AfD to protect the police from them.'
He also retweeted the right-wing extremist AfD activist Naomi Seibt with the following quote: 'Tyranny is based on the docility of cowards. I choose to be brave.'