In 2020, CSIS recorded 110 domestic extremist attacks. Of those, two thirds were from the far right, about a quarter from the far left, and the remainder were driven by religious or “ethnonationalist” causes.
I highly doubt the leftist attacks warrant a terrorism stamp since most of them are against property, not people. But then again, in the US of A, property is worth more than people.
How can one educate themselves about other people’s thoughts?