Evidently by violence. Above is the illustration accompanying this announcement at the British radical Muslim site Al-Muhajiroun (thanks to “Allah“):
Islaamic conference
How the Khilaafah will be restored
& Man-made law destroyed
…80 years on from the destruction of
the Islamic state – 3rd of March 1924…
Wednesday 3rd of March 2004,
From 7pm to 9pm, Central London.
For venue, please phone on the day of
conference: 07939 737 727. For media
enquiries call: 07956 600 569
Al-Muhajiroun seems to think, however, that they have a picture of the White House — that’s how they labeled the picture above. With intelligence of that quality, they won’t be restoring the caliphate anytime soon.