"Critics say that the group, which has thrived on university campuses, is a gateway to more extremist groups, something which it also vehemently denies."
A bit off topic, but FYI:
Stepping back in time...
http://www.freerepublic.com/focus/f-news/2134341/posts
“Hizb ut-Tahrir America May Be Ready for Its Public Debut”
COUNTERTERRORISMBLOG.org ^ | November 17, 2008 04:02 PM | Madeleine Gruen
Dr Imran Waheed, told followers of Hizb ut-Tahrir that there could be "no peace" with Israel and urged them to "fight in the way of Allah". A leaflet distributed by the international wing of the organisation also called for Muslim countries to "eliminate the state of the Jews". The remarks increased pressure on Jacqui Smith, the Home Secretary, to ban Hizb ut-Tahrir.