Be careful with this horseshoe theory, as it's been around for more than a century without any real traction in academic research and in fact been very much contradicted by recent studies. See https://en.wikipedia.org/wiki/Horseshoe_theory
This has to be one of the goofiest nitpicks because remove the "horseshoe theory" language from above the point and the above point is the still the same.
"Sure -- the two ends of the political spectrum do seem to admire political violence..."