What was the significance of the burning of pennsylvania hall by an angry mob of anti-abolitionists in 1838?

The significance of the Pennsylvania Hall being burned to the ground by anti-abolitionists in 1838 was that is showed just how deep the divide was between the abolitionists and the anti-abolitionists. The hall had been specifically built to grant a forum to people who believed slavery was evil, yet it was burned down within 4 days of the building's dedication ceremony.