A lot of this is apparently being attributed to Antifa groups, which are among the more competent and dangerous of the SJWs

Also note, they have also been involved in false flag patriot and militia activities during the Occupy movement and early stages of BLM, before the III%ers fell more solidly into the Trump camp.

A lot of these were the people flying Gadsden flags during anti-police activities and riots. In many cases, they tried to interface with and endear themselves to survivalists and less connected patriot movement people on the Internet, often attempting to gain access to weapons and equipment which would in turn be stolen.

The Washington DC police have already uncovered at least one cache of weapons which had been placed in proximity to the traditional parade routes.

In recent years, the Antifa groups have enjoyed a fair amount of implicit protection from the Justice Department. Usually in the form of their leadership gaining federal informant status and thus a lot of coordination and selective reporting of crimes. For example, they snitch their enemies and facilitate stuff for their friends. You can see how that has remained much more effective than what people assumed would be a similar model applied to the federal snitches embedded with the Patriot movement, but it also explains the high value intelligence information that those people often have.

A shitload of funding was dumped into the coffers of those groups leading up to the election and in the period shortly after. While they are corrupt as hell and most of the money is likely to just go toward pizza and drugs, you can expect some of the groups with a much more devout work ethic to engage in effective operations against the Trump Presidency and the perceived Trump constituency.