Fires happen all the time. Owners probably didn't maintain the warehouse since they couldn't pay their employees a fair wage. Where is the fire supression system?
The alleged arsonist could have been caught up in the rush of an already existing fire when the video was filmed. Blaming anyone for a warehouse without proper fire suppression seems negligent.
As per the foundational liberal thinker Jean-Jacques Rousseau: "Eat the rich". Unless you meant neoliberal. Wealth flight is a neoliberal concern.