Rotterdam's mayor Ahmed Aboutaleb has been heralded by London's mayor Boris Johnson for his outspoken comments about would-be jihadis.

Aboutaleb told television show Nieuwsuur on the day of the Charlie Hebdo killings that people who cannot accept humourists making a newspaper should 'rot op'. This was widely translated in the British media as a headline-making 'fuck off'.

'And my hero – the man who got straight to the point – was the mayor of Rotterdam, Ahmed Aboutaleb, himself a Muslim,' Johnson wrote in a column in the Telegraph newspaper.

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