He is British and was born here, he was a solicitor but was removed from the roll of solicitors in 2002. He has been involved in the formation of several extremist groups including al-Muhajiroun and Islam4Uk which were proscribed and later banned by the government and he has been instrumental in recruiting Muslim trainees who were trained in Britain and then sent abroad to fight "for the Muslim cause".
Despite being arrested several times for his extremist activities he appears to have only been fined once and not been given a custodial sentence.
Perhaps this is because his extremist and racist rants are ignored by the authorities, for example in the above link in the speech he makes which was also filmed, he says about conducting jihad (holy war) and that "the normal situation is for you to take money from the kaffer (which the item says is a non believer). So we take Jihad Seekers Allowance"
Kaffer is an arabic term that is extremely insulting and racist and is used mainly to insult Hindus because they are not Muslem and as usual no authority has taken any action, yet when white British extremists use similar derogitory words they are charged under the Racial and Religious Hatred Act 2006.
Now I have no time for these White British Extremists either, but when this occurs is it any wonder that people become disgruntled.
By the way I would also like to state that Anjem Choudary receives very little support from the mainstream UK Muslim population.