According to my findings, this claim is not supported by any evidence and is solely a conspiracy-based claim posted by Laura Loomer on X. The U.S. government has said that terrorism is a threat, but that is completely different from saying that we are currently at risk of an attack worse than 9/11.
The original primary source I found was Laura Loomer's X post. She posted on March 24th, "Soon, there will be a massive Islamic terror attack in America and the perpetrators will likely have financial ties to podcasters and those who are sowing discord for foreign nations in America. I predict there will be many casualties and only then will it maybe set in that people have been conned into supporting a terrorist psyop to distract you from the threat of Islam while the enemy plotted to destroy our country from within with botted conspiracy theories. It will likely be 10 times worse than 9/11. And it’s going to trace right back to the Woke Reich in some way. I just have this sense" (Laura Loomer X post). According to this post, she quite literally said this is her prediction and that she "just has this sense." Absolutely no viable evidence is quoted or even alluded to.
https://x.com/LauraLoomer/status/2036437237022281981?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E2036437237022281981%7Ctwgr%5E26651a595084bec8881d8e89a10a83657a33895d%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.timesnownews.com%2Fworld%2Fus%2Fus-buzz%2Flaura-loomer-warns-of-worse-than-9-11-terror-attack-suggests-false-flag-scenario-amid-iran-conflict-article-153915496
Additionally, the next source I found was the FBI's threat-warning website, which explains the differences between specific and credible threats. This is important to familiarize yourself with, so you can distinguish between viable threats. Laura Loomers X post is not credible.
https://www.fbi.gov/how-we-investigate/intelligence/the-fbis-use-of-specific-and-credible-in-threat-warning?utm_source=chatgpt.com
According to an article by Kanishka Singh and Gabriella Borter, Loomer is described as a "far right conspiracy theorist." She has a history of posting racist, hateful speech, and other harmful rhetoric.
"White House condemns Trump ties to conspiracy theorist Laura Loomer" By Kanishka Singh and Gabriella Borter.