This article and the chart within, is being used by the left to claim that left wing violence is small compared to right wing violence, at least until this year.
I don't know who this CSIS is but I suspect it is a very left wing organization with an agenda. I have seen several News organizations pick this up and run with it, presumably without looking at it. But it is clearly not accurate and I believe intentionally so.
Go the the chart and look at 2020 for example. It shows 30 actions or plots attributed to the right. Only 8 actions have been attributed to the left. But remember 2020 and the summer of George Floyd riots? Cities all over America were burned, looted and overrun by BLM and Antifa rioters for an entire summer. Yet this chart shows only 8 incidents attributed to the left. How is it possible there were only 8 actions or plots for 2020? There were literally hundreds.
And what constitutes a plot? Does a tweet threatening the president count as a plot because that would add thousands more to the left's column.
The point is, when you see articles or charts like this,, do not take them at face value. Do not assume the media looked into the data.
https://www.csis.org/analysis/ideological-trends-us-terrorism