Passages taken from the Wikipedia link, can't see anything untoward here.
/// In May 2013, following the murder of Lee Rigby, Britain First released a video threatening to place Islamist cleric Anjem Choudary under citizen's arrest if the Metropolitan Police would not arrest him. ///
/// In February 2014, Britain First conducted what it called the "Christian Patrol" in an area of Tower Hamlets, East London, with a high Muslim population, to counter continuing Muslim Patrols which had first come to media attention in 2013 ///
/// In July 2014, Britain First entered the Crayford Mosque in South London, demanding that its segregated entrances be removed, with Golding saying, "When you respect women we’ll respect your mosques." ///
/// In August 2014, after a report which revealed that over 1,400 girls had been sexually abused in Rotherham, mainly by Pakistani men, Britain First protested inside the headquarters of Rotherham Metropolitan Borough Council with a banner saying "Justice for victims of Muslim grooming". ///