I still believe he had help.
One thing nobody has mentioned is how this could possibly effect censorship on social media.
Since he livestreamed his attack and published everything on 8 chan there could be a major crackdown on internet communications.
As for social media...some of these communications are allowed as investigators follow their postings in order to track and discover who and where they are... so many attempted attacks have been stopped long before they are carried out as a result. People are often flabbergasted and stunned at what people express on line.....unfortunately that is exactly what human nature is hiding behind a computer screen. Only by the grace of God are we any different....