How 9/11 conspiracy theories moved into mainstream American politics

What the report says

Al Jazeera reports that 9/11 conspiracy theories, once mostly associated with fringe online communities, have become more visible in mainstream US politics over the past two decades. The article says social media, the internet, and declining trust in government and traditional media have helped false claims spread to larger audiences, including narratives tied to the CIA, the “deep state,” QAnon, and election fraud.

The piece places the shift in historical context, noting that the September 11, 2001 attacks on New York’s World Trade Center were widely watched in real time and became an enduring source of speculation. It also connects later mistrust to the US wars in Afghanistan and Iraq, especially the now-discredited claim that Iraq possessed weapons of mass destruction. Al Jazeera cites experts who say government falsehoods and political polarization have made conspiracy thinking more attractive.

The article argues that the decisive change came in the Trump era, when conspiracy claims were repeatedly amplified by Donald Trump and other conservative figures. It says Trump’s embrace of “birther” claims, “deep state” rhetoric, and election-fraud allegations helped normalize conspiratorial language and energize parts of the MAGA base.

Al Jazeera adds that the spread of 9/11-related claims has been reinforced by platforms such as YouTube, where videos and documentaries continue to attract large audiences. The broader significance, according to the report, is that conspiracy theories are no longer confined to the margins; they now shape political identity, public debate, and mistrust in democratic institutions.