By AMANDA SEITZ Yahoo News

WASHINGTON (AP) — The social media posts are of a distinct type. They hint darkly that the CIA or the FBI are behind mass shootings. They traffic in racist, sexist and homophobic tropes. They revel in the prospect of a “white boy summer.”

White nationalists and supremacists, on accounts often run by young men, are building thriving, macho communities across social media platforms like Instagram, Telegram and TikTok, evading detection with coded hashtags and innuendo.

Their snarky memes and trendy videos are riling up thousands of followers on divisive issues including abortion, guns, immigration and LGBTQ rights. The Department of Homeland Security warned Tuesday that such skewed framing of the subjects could drive extremists to violently attack public places across the U.S. in the coming months.

These type of threats and racist ideology have become so commonplace on social media that it’s nearly impossible for law enforcement to separate internet ramblings from dangerous, potentially violent people, Michael German, who infiltrated white supremacy groups as an FBI agent, told the Senate Judiciary Committee on Tuesday.

“It seems intuitive that effective social media monitoring might provide clues to help law enforcement prevent attacks,” German said. “After all, the white supremacist attackers in Buffalo, Pittsburgh and El Paso all gained access to materials online and expressed their hateful, violent intentions on social media.”

But, he continued, “so many false alarms drown out threats.”

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