Joseph, it is not true that the far left has killed more than the far right. A few police officers (such as in Dallas and Baton Rouge) have been killed by people influenced by the more extreme elements of Black Lives Matter. But other than that, there have been no deaths from left wing radicals since the Unabomber in the 1990s. The last time an anarchist killed somebody was decades ago.
By contrast, far-right radicals (sovereign citizens, neo-Nazis, militant pro-lifers) have killed dozens of people since 9/11. (Don’t forget the OKC bombing as well.) You can find lists of these killings on many websites, including the ADL. Examples include Frazier Miller (a white supremacist who shot people at a JCC), Dylan Roof (a white supremacist who killed 9 black people to try to start a race war and bring fellow white supremacists to power), and Wade Michael Page (a white supremacist who killed 6 Sikhs.) Sovereign citizens (anti-government extremists fueled by bizarre conspiracy theories about the history of American law) have killed a number of police officers in recent years, motivated by their radical anti-government ideology.
It’s kind of unfair to call them far-right, because they have almost nothing in common ideological with mainstream conservatives, or even the far right of the Republican party (deporting illegal immigrants is a lot different than killing them all.) But they’re called that for the sake of convenience, because they have some similar ideas (being against some immigration), but simply more extreme. Mainstream conservatives shouldn’t rush to defend far-right extremists, as if they’re somehow on the same side.