Worshippers at Glasgow’s largest mosque were locked in as tensions flared following a stabbing in Northern Ireland, with police saying people were “attacked because of the colour of their skin”. Three men, one aged 31 and the others aged 18, were arrested on Wednesday in Scotland’s largest city following the unrest, in which three members of the public and two police officers were hurt, Police Scotland said. Protesters took to the streets in several parts of Scotland, including Glasgow city centre, with some of those involved invoking the memory of murdered 18-year-old Henry Nowak, with one banner saying “white lives...