Both.
They omitted/absolved murders like the Aaron Danielson murder (that wasn't categorized as 'political violence') while including
by special admission, which they highlighted Jan 6. Put plainly, the BLM George Floyd riots, $2.2B in damage, 20 dead, were not classified as political violence because that was social unrest- but not all riots. Charlottesville and Jan 6 were both included, not as social unrest, but as political violence. That's lying with numbers.
They're definitely posting numbers to give you the impression that the right is at least as violent as the left. They're doing this to support the "both sides" argument. That argument- "Both sides do it!" - absolves the left of having to admit that the vast majority in scope and scale comes from the left.
The reason they're doing this is because it upsets the core tenet of the left in America today- the oppressor/oppressed binary.
If you're the oppressed (trans, LGBTQ, climate activist, Palestine supporter, abortion advocate), then no act you commit is morally bad; you were the oppressed, you did what you had to do.
If that narrative is disproven by showing the left are the folks that are doing all the things to the other side, it sort of makes the victim angle hard to support.