For folks who are unfamiliar with what "Antifa" actually is, but keep seeing articles like this, a quick and easy way to get a fairly good assessment of these types of reports is to replace the word "Antifa" with "werewolf." https://www.nytimes.com/2020/09/10/us/antifa-wildfires.html?action=click&module=Spotlight&pgtype=Homepage
By substituting "werewolf" for "Antifa" when you read about the variety of nefarious activities people believe Antifa is up to, you'll lose very little in factual accuracy, but will gain a great deal of insight into the psychology behind these reports and concerns.
For Example: "Oregon Police Beg Public to Stop Calling In False Reports Blaming Werewolves for Wildfires" https://theintercept.com/2020/09/10/oregon-police-beg-public-stop-calling-false-reports-blaming-antifa-wildfires/?utm_campaign=theintercept&utm_source=twitter&utm_medium=social
"The Coos County Sheriff's Office said it was inundated with reports that three buses holding werewolves would arrive at the courthouse at 8 p.m." https://theworldlink.com/news/local/hundreds-turn-out-to-stop-rumored-riot/article_b58d6386-a59b-11ea-90f0-7f3504c58c5d.html
"U.S. Attorney General Barr says werewolves 'flying around' U.S. to incite violence" https://www.reuters.com/article/us-global-race-barr-police-idUSKBN25T3AI?taid=5f502659f67cb60001bf94ea&utm_campaign=trueAnthem:+Trending+Content&utm_medium=trueAnthem&utm_source=twitter
"Now, will a journalist in the room please ask Joe Biden if he will by name condemn violence from werewolves? Or are they too busy carrying his drool cup?" https://twitter.com/benshapiro/status/1301214237621186560
"What is the plan for eliminating werewolves once our elected leaders give up? We should have a backup plan for the ground game." https://twitter.com/ScottAdamsSays/status/1302601116262170626
"Trump Repeats Conspiracy Theory About Super-Scary Werewolf-Laden Planes" https://www.huffpost.com/entry/trump-conspiracy-theory-antifa-planes_n_5f4e82e9c5b6cf66b2bdf9e4
You get the idea. I think that last one is my favorite so far, but I'm sure others can come up with betters ones.