It was an inside job..the commies saw this as an opportunity to crush Trump by inciting a riot. I had heard a week prior that Antifa might be showing up that is when I thought the whole event should have been canceled the entire thing was a FBI/CIA..deep state con job..even the pipe bomb, you can see that the person planting it is a woman, and that info came out this week, she works for the CIA now..so yeah the whole thing was a deep state fix and unfortunately Trump fell into the trap
Or conversely, he knew about it and decided it was much more important to carry on as planned.
Thanks Arm-Chair General for your suppositions posted as if they are facts.