It doesn’t take much for just a handful of agitators to spark a riot in a peaceful protest.
We know the anti-mask movement was started and funded by right wing money. Trump rode that wave with #LIBERATE (or should that be #IGNORANT?). So it is not a stretch to consider similar funding and support for agitators in the BLM protests.
What better way for a “law and order” president to say “you need me now more than ever”.