That doesn make sense tbh. Where the fuck did they get that from? They don't even know what the term blackpill means
FBI, CIA and government intelligence agencies like the General Directorate for Internal Security in France, have access to a lot of brutal blackpilled informations about everybody. In France, I saw one of their agents hacking all the photo of a random smartphone in the crowd through Bluetooth. He downloaded all the content of the smartphone in a mere seconds, then showed it to the smartphone owner just to demonstrate that Bluetooth was a wide open door if you let it open all the time on your devices.
They're not collecting informations about dangerous people ; they're collecting informations about everybody, with no exception.
Who does what, lives where, works where, how much money in all of their bank accounts (it's very easy with the TRACFIN tool, I once had access to my bank accounts history, every interaction with any bank was recorded). Who fucks who, who is member of their family, every record with the legal system from fines to jail sentences,
all your medical data (medical folders are now shared among all the doctors you'll interact with in France, so it's fucking easy for them to know everything you have). In France too, since the Hadopi law, they have the right to see everything you've done on the web, every website you've gone.
So it's very easy for those agencies to know who is incel, who says what here, who plans to kill people, who isn't planning to do it, what's the nature of the threat, because they're obliged to have all clear informations about every potential threatening activities. It also applies to BLM protesters, women's activists, environment activists, white supremacists, and so on. They even track their own government personnel.
Plus those agencies organize meetings with other agencies, like DGSE meeting the CIA and sharing some data about people and threats. They also spy each other and kill other agents (including allies of necessary) in operation. But they can also organize "accidents" ; for example, if a US citizen goes in Syria and becomes a terrorist, the US government wishes to kill him but legally can't because he's a US citizen. So the CIA asks the DGSE to accidentally shoot at "terrorists" and the guy dies, shot by a French sniper who will say he made a "mistake". In exchange for such a service, CIA is also asked by France to "accidently" kill French citizen that would've turned terrorists in Syria. If there is a legal investigation, the report will only say "the US Army accidently shot our French citizen during one of their military operations".
Keep in mind that all those agencies have to justifiy their wages, so they must know everything of a bomb explodes somewhere, because the president will call them 10 minutes later to know who did this. The power of those agencies has drastically increased since 9/11.