We had a peaceful protest in Kansas City on Friday where some police joined in, listened to protestors, took a knee with the protestors, and the mayor joined the protest as well. It was peaceful and all over the news.
The very next day we had several trucks unloading beds of bricks and large rocks throughout the Plaza (where protests were and would be again that night) throughout the day and people were snapping videos of at least two buses full of protesters in the full black getup unloading on the edge of the Plaza a few hours before sundown. That night we had 85 arrests, multiple cars set on fire, multiple officers put in the hospital, and plenty of CS gas in the streets.
After seeing the peaceful protest on Friday, I find it a little bit suspicious that the crowds grew so quickly and things escalated so quickly (and intentionally, by the looks of people dropping of brick caches) just 24 hours later.