There are hateful preachers that preach hate at mosques. Here's a very well known British hate preacher:
Quote:
A critic of the UK's involvement in the wars in Iraq and Afghanistan, Choudary praised those responsible for the 11 September 2001 and 7 July 2005 attacks. He supports the implementation of Sharia law throughout the UK and marched in protest at the Jyllands-Posten cartoons controversy, following which he was prosecuted for organising an unlawful demonstration. He was investigated, but not charged, for his comments in 2006 regarding Pope Benedict XVI. He is currently on bail pending prosecution for inviting support of a proscribed organisation, namely the Islamic State of Iraq and the Levant.
I am concerned about how they will know too, but if they are sure a religious place is preaching hate then it should be closed. Your freedom ends when you damage other people.