It is actual Muppets canon that Kermit the Frog, in some way, had a role in bringing down the Twin Towers in the terror attacks of September 11, 2001.

In a Muppets Christmas film released in late 2002, Kermit is shown a glimpse of what New York City might look like if he had never been born. Among the scenery of this alternate reality NYC, we find none other than the Twin Towers proudly standing in the background. They were, of course, long destroyed in Kermit's normal reality. And yet, in the world without Kermit, the war on terror is missing its powder keg spark. Who would've thought that green piece of ♥♥♥♥ could kermit a terror attack on US soil, but there it stands unimpeachable... We have concrete, canon proof of involvement. Why the world hasn't stopped and asked further questions is only further proof of a media cabal keeping this conversation away from the masses.

The Twin Towers would still be standing if it weren't for Kermit the Frog. Al Qaeda was the puppet this time, and Kermit the hand within.