But then there was this: https://twitter.com/NatSecGeek/status/1273329710576152581
https://www.csis.org/analysis/rise-far-right-extremism-unite...
https://www.americanprogress.org/issues/security/reports/201...
https://www.nytimes.com/interactive/2019/04/03/world/white-e...
https://www.theatlantic.com/ideas/archive/2019/01/homegrown-...
So right wing terrorism is a greater threat, unless you are worried about being killed.
But if asked "Are you more worried about right wing or islamist extremists?", my answer is "Yes".
(It's also worthwhile in discussions about "crime" to remember that it's a very loaded term. For example, wage theft numbers absolutely eclipse burglary, yet those are rarely what we think about when we hear "crime")