"Right-wing extremists were responsible for the vast majority of domestic terror attacks and foiled or aborted plots in the past 30 years, followed by Islamic jihadis."
Yes, clearly it's the left that's the problem.
"However, left-wing attacks were very rarely fatal with only two deaths since 2020 - Luigi Mangione's alleged assassination of UnitedHealthcare boss Brian Thompson last year, and Michael Reinoehl's fatal shooting of right-wing protester Aaron Danielson in Portland, Oregon, in August 2020."
Well, so much for your claim of "uptick in violent leftist extremism". Two deaths, and that's giving you Luigi Mangione as an extreme leftist, which itself is a pretty dubious claim.
But hey, at least right wing attacks were down the last few years. I wonder why that might be?
"CSIS said Joe Biden's crackdown on far-right groups after the January 6, 2021, insurrection also helped, as it left extremist movements in disarray."
Oh hmm.... well good thing all of those insurrectionists are still in jail so they can't do any more harm. Oh...wait a minute...