Car bombs and attacks on cities across Iraq killed at least 20 people and wounded more than 200, officials said.
The wave of attacks in Baghdad, Kirkuk, Nassiriya, Tuz Khurmato and other towns, came days before Iraqis vote in provincial elections.
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Activists, including a young woman wearing a head scarf, spoke out in turn in front of the cameras assembled to hear leader Paul Nuttall.
Mr Farron's bizarre comment was made to an activist who came to watch the party leader speak in Cambridge on Thursday.
The US actor starred in Disney's 2004 film Miracle, chronicling the US men's hockey team at the 1980 Winter Olympics.