The far left is extremely dangerous as well.
Unless you are the window in a bank or large corporate chain business, the far left are statistically no danger to you at all.
Even if we separate Islamism from the far right, the far right remains responsible for the vast majority of political violence, the vast majority of politically motivated killing and a significant amount of non-politically motivated killing (because, again, there's a significant overlap between the far right and organized crime). By contrast, you can count the number of deaths from far left extremist violence over the past decade on one hand. The far left doesn't intentionally infiltrate police departments and the military. The far left does not seek to influence or usurp the political system. The far left do not organize paramilitary training camps to learn how to conduct armed terrorism.
You, personally, may be more frightened of the far left than the far right. That is your right as an individual, but it is also extremely stupid and short-sighted. If someone is going to murder you for political reasons, it's far more likely to be some mentally deranged incel with a swastika painted on his rifle than anyone else. You are not safe from these people. Noone is.
And the increased crime caused by stupid far left policy isn't a thing?
The hell are you even talking about.
I don't know who you think the "far left" actually is, but in reality it comes down to revolutionary versus non-revolutionary politics. The far left don't have policy because they refuse to participate in a government they see as illegitimate. They are actual extremists who have given up on the ability of the political system to realize their goals, not people who are concerned because the cops keep murdering innocent people. That's a pretty normal concern to have, because cops killing innocent people kind of goes against what moderates believe the cops are supposed to be for.
One of the ways for this far right that you're so afraid to happen is from chaos and disorder, and the left is causing that to happen more than the right.
The far right, on a fundamental ideological level, view the modern world as disordered. Racial and sexual equality is disorder to them. Secularism is disorder to them. Democracy is disorder to them.
I realize this may be difficult for a self-appointed "centrist" to understand, but people do not all fundamentally want the same thing and not everyone is reasonable and well meaning.