Lots of conspiracy stories about this.
Plenty of people crying how he must have lied about his political position because only a leftist could do something like this.
Cries about this being a false flag attack.
Someone linked a video from Sargon of Akkad where he tries to be "objective" about all the "conflicting information" about the shooting ...and then he proceeds to try to discredit the police as source of info about the shooting. That is something that should raise a few flags, it's one thing to remind people that random witnesses or anonymous sources on the net might be wrong but he actively puts the police in the same category and tells people to be suspicious of what the police tells you...