On Wednesday evening the BBC hosted a leaders' debate between the six party leaders in Scotland. However it ended in a shouting match between Labour's Jim Murphy and Ukip's David Coburn, as the Ukip MEP attacked "open door immigration".
"Stop demonising people," Murphy responded angrily. "My family came to this country as immigrants." The Scottish Labour leader won applause from the audience as he mocked Coburn. "The immigrants are to blame for everything," Murphy said, characterising the Ukip argument.
Nicola Sturgeon, the SNP leader, also hit out at Coburn for recently comparing SNP minister Humza Yousaf to convicted terrorist Abu Hamza. The Scottish first minister told the audience in Aberdeen that the Ukip MEP was "absolutely disgusting”.
Coburn was accused of racism for linking Yousaf and Hamza simply because both are Muslim. Challenged on his comments at a debate in London last month, Coburn said he had made a "very stupid joke" and apologised. "I am human, I make errors," he said. "People in Ukip, we are not professional politicians. We are human, we make errors."