Just my observation from listening, reading and watching from afar, this guy was like a lone wolf who acted under the radar as an embedded terrorist cell waiting for the right time and venue to carry out his attack.
But with all the government surveillance of Americans going on, it is surprising that investigators have not uncovered any inkling of a motive yet.
or at least one they are willing to disclose. Never trust a Fed.
They knew within an hour after he was dead exactly what his motive was. They do not want to inspire a bunch of other disgruntled leftists copycats who feel wronged by the electoral process and would like to start a civil war to get their way.